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Finding the Fourth Proportional to 123,129.56, 169,918.76 and 69,414.58

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Solution

The fourth proportional to 123,129.56, 169,918.76 and 69,414.58 is: 95,792.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,129.56 : 169,918.76 = 69,414.58 : x
  2. Step 2: Convert to fraction form
    123,129.56/169,918.76 = 69,414.58/x
  3. Step 3: Cross multiply
    123,129.56x = 169,918.76 × 69,414.58
  4. Step 4: Simplify right side
    123,129.56x = 11,794,839,359.52
  5. Step 5: Solve for x
    x = 11,794,839,359.52/123,129.56
  6. Step 6: Final answer
    x = 95,792.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.