It could be to show a contrast between wealth and age, or maybe it's just for comical effect. Not sure exactly.
The image of a rich fat man laughing old in a cartoon might be used to highlight societal stereotypes or to tell a story with a twist. It's hard to say for sure without more context.
The rich fat man in the cartoon might be laughing because he achieved a personal goal or received some great news. Maybe he's surrounded by friends and having a fun time that made him laugh.
Typically, such a character might have a luxurious lifestyle, drive fancy cars, and have a lot of power and influence. But he could also be shown as lonely or having trouble with genuine relationships due to his wealth and appearance.
Typically, in a fat man laughing cartoon, you'd expect to see a guy with a round face, chubby cheeks, and a big grin. The clothes he wears might also be styled in a way that makes him look even more comical. And the sound effects or music accompanying the scene could enhance the hilarity.
It usually shows a jolly and overweight man with a big smile and a sense of humor. The expressions and body language are exaggerated for comical effect.
Maybe it's when his money is in danger or his pride is hurt. That could easily make him angry.
The angry old rich fat man in the cartoon could be furious because his business plans failed or his family didn't listen to him. Maybe he's also envious of someone younger and more successful.
The humor and the expression on the fat man's face can make it appealing. It might just bring a smile to your face.
Maybe he just heard a funny joke and couldn't help but laugh.
A cartoon fat rich man might be depicted as having a big belly, wearing expensive suits, and often surrounded by luxury items.
Maybe it's 'Fat Albert and the Cosby Kids'. There were some characters with wealth and larger builds in that show.