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Finding the Fourth Proportional to 138,998.71, 191,819.19 and 75,337.57

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Solution

The fourth proportional to 138,998.71, 191,819.19 and 75,337.57 is: 103,966.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,998.71 : 191,819.19 = 75,337.57 : x
  2. Step 2: Convert to fraction form
    138,998.71/191,819.19 = 75,337.57/x
  3. Step 3: Cross multiply
    138,998.71x = 191,819.19 × 75,337.57
  4. Step 4: Simplify right side
    138,998.71x = 14,451,191,653.97
  5. Step 5: Solve for x
    x = 14,451,191,653.97/138,998.71
  6. Step 6: Final answer
    x = 103,966.37

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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.