Elder sibling Mukesh Ambani, 61, toppled China’s Jack Ma as Asia’s richest man, after driving a telecommunications revolution in India that propelled his petrochemicals conglomerate Reliance Industries Ltd. into the $100 billion club. His personal fortune had swollen to more than $40 billion as of Friday, according to the Bloomberg Billionaires Index, billions ahead of Ma and at similar levels to Microsoft Corp.’s former chief, Steve Ballmer.