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Finding the Fourth Proportional to 123,616.80, 185,425.20 and 92,512.80

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Solution

The fourth proportional to 123,616.80, 185,425.20 and 92,512.80 is: 138,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,616.80 : 185,425.20 = 92,512.80 : x
  2. Step 2: Convert to fraction form
    123,616.80/185,425.20 = 92,512.80/x
  3. Step 3: Cross multiply
    123,616.80x = 185,425.20 × 92,512.80
  4. Step 4: Simplify right side
    123,616.80x = 17,154,204,442.56
  5. Step 5: Solve for x
    x = 17,154,204,442.56/123,616.80
  6. Step 6: Final answer
    x = 138,769.20

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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.