How does the author use foreshadowing in Citizen of the Galaxy?

In Chapter Sixteen, the reader learns that Thorby's share of the Sisu's wealth is one eighty-third of what was acquired during his stay on the ship. This indicates that there were eighty-three people aboard the ship including Thorby. Thorby is clearly uncomfortable with this level of wealth, foreshadowing the discomfort he will later have when he acquires a significantly greater fortune.