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Finding the Fourth Proportional to 72,447.10, 108,691.17 and 25,704.70

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Solution

The fourth proportional to 72,447.10, 108,691.17 and 25,704.70 is: 38,564.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,447.10 : 108,691.17 = 25,704.70 : x
  2. Step 2: Convert to fraction form
    72,447.10/108,691.17 = 25,704.70/x
  3. Step 3: Cross multiply
    72,447.10x = 108,691.17 × 25,704.70
  4. Step 4: Simplify right side
    72,447.10x = 2,793,873,917.50
  5. Step 5: Solve for x
    x = 2,793,873,917.50/72,447.10
  6. Step 6: Final answer
    x = 38,564.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.