5. Gina Rinehart ($10.2 billion)
Gina Rinehart is the owner of many businesses in Australia, such as Hope Downs, Roy Hill Project, Hancock Prospecting, and Prime Wagyu cattle.
The biggest business is the iron-ore company which she inherits from her late father, Lang Hancock. He was a famous iron-ore explorer.
The company was falling into bankruptcy when she took over. However, she turned it into a money-making machine. That is why this 62-years-old widow is not just the richest, but also the world’s 51st most powerful woman.
She is now living in Perth, Australia. Her net worth has grown from $8.8 billion by the end of last year to $10.2 billion now. This put her as the 127th billionaire in the world and the richest in Australia.