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Finding the Fourth Proportional to 123,761.60, 170,789.96 and 67,171.76

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Solution

The fourth proportional to 123,761.60, 170,789.96 and 67,171.76 is: 92,696.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,761.60 : 170,789.96 = 67,171.76 : x
  2. Step 2: Convert to fraction form
    123,761.60/170,789.96 = 67,171.76/x
  3. Step 3: Cross multiply
    123,761.60x = 170,789.96 × 67,171.76
  4. Step 4: Simplify right side
    123,761.60x = 11,472,262,203.53
  5. Step 5: Solve for x
    x = 11,472,262,203.53/123,761.60
  6. Step 6: Final answer
    x = 92,696.46

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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.