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Finding the Fourth Proportional to 138,519.40, 207,789.90 and 59,636.20

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Solution

The fourth proportional to 138,519.40, 207,789.90 and 59,636.20 is: 89,458.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,519.40 : 207,789.90 = 59,636.20 : x
  2. Step 2: Convert to fraction form
    138,519.40/207,789.90 = 59,636.20/x
  3. Step 3: Cross multiply
    138,519.40x = 207,789.90 × 59,636.20
  4. Step 4: Simplify right side
    138,519.40x = 12,391,800,034.38
  5. Step 5: Solve for x
    x = 12,391,800,034.38/138,519.40
  6. Step 6: Final answer
    x = 89,458.95

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1.5x scale

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.