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Finding the Fourth Proportional to 138,617.02, 207,951.12 and 43,871.02

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Solution

The fourth proportional to 138,617.02, 207,951.12 and 43,871.02 is: 65,814.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,617.02 : 207,951.12 = 43,871.02 : x
  2. Step 2: Convert to fraction form
    138,617.02/207,951.12 = 43,871.02/x
  3. Step 3: Cross multiply
    138,617.02x = 207,951.12 × 43,871.02
  4. Step 4: Simplify right side
    138,617.02x = 9,123,027,744.54
  5. Step 5: Solve for x
    x = 9,123,027,744.54/138,617.02
  6. Step 6: Final answer
    x = 65,814.63

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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.