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Finding the Fourth Proportional to 71,691.08, 98,933.46 and 39,859.97

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Solution

The fourth proportional to 71,691.08, 98,933.46 and 39,859.97 is: 55,006.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,691.08 : 98,933.46 = 39,859.97 : x
  2. Step 2: Convert to fraction form
    71,691.08/98,933.46 = 39,859.97/x
  3. Step 3: Cross multiply
    71,691.08x = 98,933.46 × 39,859.97
  4. Step 4: Simplify right side
    71,691.08x = 3,943,484,747.60
  5. Step 5: Solve for x
    x = 3,943,484,747.60/71,691.08
  6. Step 6: Final answer
    x = 55,006.63

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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.