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Finding the Fourth Proportional to 138,906.62, 191,691.17 and 75,244.43

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Solution

The fourth proportional to 138,906.62, 191,691.17 and 75,244.43 is: 103,837.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,906.62 : 191,691.17 = 75,244.43 : x
  2. Step 2: Convert to fraction form
    138,906.62/191,691.17 = 75,244.43/x
  3. Step 3: Cross multiply
    138,906.62x = 191,691.17 × 75,244.43
  4. Step 4: Simplify right side
    138,906.62x = 14,423,691,488.01
  5. Step 5: Solve for x
    x = 14,423,691,488.01/138,906.62
  6. Step 6: Final answer
    x = 103,837.33

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1.5x scale

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.