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Finding the Fourth Proportional to 138,062.48, 207,069.42 and 36,861.79

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Solution

The fourth proportional to 138,062.48, 207,069.42 and 36,861.79 is: 55,286.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,062.48 : 207,069.42 = 36,861.79 : x
  2. Step 2: Convert to fraction form
    138,062.48/207,069.42 = 36,861.79/x
  3. Step 3: Cross multiply
    138,062.48x = 207,069.42 × 36,861.79
  4. Step 4: Simplify right side
    138,062.48x = 7,632,949,475.46
  5. Step 5: Solve for x
    x = 7,632,949,475.46/138,062.48
  6. Step 6: Final answer
    x = 55,286.20

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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.