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Finding the Fourth Proportional to 138,779.39, 207,951.03 and 107,266.61

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Solution

The fourth proportional to 138,779.39, 207,951.03 and 107,266.61 is: 160,731.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,779.39 : 207,951.03 = 107,266.61 : x
  2. Step 2: Convert to fraction form
    138,779.39/207,951.03 = 107,266.61/x
  3. Step 3: Cross multiply
    138,779.39x = 207,951.03 × 107,266.61
  4. Step 4: Simplify right side
    138,779.39x = 22,306,202,553.99
  5. Step 5: Solve for x
    x = 22,306,202,553.99/138,779.39
  6. Step 6: Final answer
    x = 160,731.37

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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.