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Finding the Fourth Proportional to 71,522.86, 98,701.94 and 39,691.79

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Solution

The fourth proportional to 71,522.86, 98,701.94 and 39,691.79 is: 54,774.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,522.86 : 98,701.94 = 39,691.79 : x
  2. Step 2: Convert to fraction form
    71,522.86/98,701.94 = 39,691.79/x
  3. Step 3: Cross multiply
    71,522.86x = 98,701.94 × 39,691.79
  4. Step 4: Simplify right side
    71,522.86x = 3,917,656,229.86
  5. Step 5: Solve for x
    x = 3,917,656,229.86/71,522.86
  6. Step 6: Final answer
    x = 54,774.88

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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.