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Finding the Fourth Proportional to 138,468.80, 207,265.80 and 108,725.60

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Solution

The fourth proportional to 138,468.80, 207,265.80 and 108,725.60 is: 162,744.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,468.80 : 207,265.80 = 108,725.60 : x
  2. Step 2: Convert to fraction form
    138,468.80/207,265.80 = 108,725.60/x
  3. Step 3: Cross multiply
    138,468.80x = 207,265.80 × 108,725.60
  4. Step 4: Simplify right side
    138,468.80x = 22,535,098,464.48
  5. Step 5: Solve for x
    x = 22,535,098,464.48/138,468.80
  6. Step 6: Final answer
    x = 162,744.95

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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.