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Finding the Fourth Proportional to 138,291.20, 207,437.76 and 59,338.88

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Solution

The fourth proportional to 138,291.20, 207,437.76 and 59,338.88 is: 89,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,291.20 : 207,437.76 = 59,338.88 : x
  2. Step 2: Convert to fraction form
    138,291.20/207,437.76 = 59,338.88/x
  3. Step 3: Cross multiply
    138,291.20x = 207,437.76 × 59,338.88
  4. Step 4: Simplify right side
    138,291.20x = 12,309,124,348.11
  5. Step 5: Solve for x
    x = 12,309,124,348.11/138,291.20
  6. Step 6: Final answer
    x = 89,008.73

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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.