George Soros, the 83-year-old billionaire investor and philanthropist is set to marry health-care and education-consultant Tamiko Bolton (42) on Saturday with 3 days of celebrations. This will be third marriage for Soros, who has a net worth of $20-billion according to Forbes, while second for Bolton. Soros was divorced from Annaliese Witschak in 1983 and Susan Weber Soros in 2005.