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Finding the Fourth Proportional to 71,744.72, 99,006.36 and 39,913.52

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Solution

The fourth proportional to 71,744.72, 99,006.36 and 39,913.52 is: 55,079.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,744.72 : 99,006.36 = 39,913.52 : x
  2. Step 2: Convert to fraction form
    71,744.72/99,006.36 = 39,913.52/x
  3. Step 3: Cross multiply
    71,744.72x = 99,006.36 × 39,913.52
  4. Step 4: Simplify right side
    71,744.72x = 3,951,692,329.99
  5. Step 5: Solve for x
    x = 3,951,692,329.99/71,744.72
  6. Step 6: Final answer
    x = 55,079.90

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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.