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Finding the Fourth Proportional to 71,788.82, 99,068.56 and 39,957.03

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Solution

The fourth proportional to 71,788.82, 99,068.56 and 39,957.03 is: 55,140.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,788.82 : 99,068.56 = 39,957.03 : x
  2. Step 2: Convert to fraction form
    71,788.82/99,068.56 = 39,957.03/x
  3. Step 3: Cross multiply
    71,788.82x = 99,068.56 × 39,957.03
  4. Step 4: Simplify right side
    71,788.82x = 3,958,485,324.08
  5. Step 5: Solve for x
    x = 3,958,485,324.08/71,788.82
  6. Step 6: Final answer
    x = 55,140.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.