Jack divided his fortune of $92,000 into 8 equal portions. He gave 4 portions to his wife, 1 portion to his son and divided the remaining portions equally among 5 charities. How much more money did his son get than each charity?

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One portion is $92,000 ÷ 8 = $11,500.

Since Jack gave 4 portions to his wife and 1 portion to his son, he gave 8 – 4 – 1 = 3 portions to charities.

Therefore, the charities received 3 × $11,500 = $34,500 altogether.

Then each charity received $34,500 ÷ 5 = $6,900.

Since his son received one portion of $11,500, his son received $11,500 – $6,900 = $4,600 more than each charity.