Reliance Industries Chairman Mukesh Ambani has slipped to 11th position among world's richest people with $76.5 billion wealth, Bloomberg reported. Jeff Bezos remains the world's richest with $186 billion wealth, followed by Elon Musk, Bill Gates, Bernard Arnault and Mark Zuckerberg. Warren Buffett is world's 6th richest man, followed by Larry Page, Steve Ballmer, Sergey Brin and Larry Ellison.