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Finding the Fourth Proportional to 123,861.39, 170,918.28 and 68,672.18

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Solution

The fourth proportional to 123,861.39, 170,918.28 and 68,672.18 is: 94,761.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,861.39 : 170,918.28 = 68,672.18 : x
  2. Step 2: Convert to fraction form
    123,861.39/170,918.28 = 68,672.18/x
  3. Step 3: Cross multiply
    123,861.39x = 170,918.28 × 68,672.18
  4. Step 4: Simplify right side
    123,861.39x = 11,737,331,363.96
  5. Step 5: Solve for x
    x = 11,737,331,363.96/123,861.39
  6. Step 6: Final answer
    x = 94,761.83

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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.