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Finding the Fourth Proportional to 123,528.62, 170,469.49 and 66,940

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Solution

The fourth proportional to 123,528.62, 170,469.49 and 66,940 is: 92,377.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,528.62 : 170,469.49 = 66,940 : x
  2. Step 2: Convert to fraction form
    123,528.62/170,469.49 = 66,940/x
  3. Step 3: Cross multiply
    123,528.62x = 170,469.49 × 66,940
  4. Step 4: Simplify right side
    123,528.62x = 11,411,227,660.60
  5. Step 5: Solve for x
    x = 11,411,227,660.60/123,528.62
  6. Step 6: Final answer
    x = 92,377.20

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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.