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Finding the Fourth Proportional to 123,542.72, 170,489.98 and 66,954.09

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Solution

The fourth proportional to 123,542.72, 170,489.98 and 66,954.09 is: 92,397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,542.72 : 170,489.98 = 66,954.09 : x
  2. Step 2: Convert to fraction form
    123,542.72/170,489.98 = 66,954.09/x
  3. Step 3: Cross multiply
    123,542.72x = 170,489.98 × 66,954.09
  4. Step 4: Simplify right side
    123,542.72x = 11,415,001,905.59
  5. Step 5: Solve for x
    x = 11,415,001,905.59/123,542.72
  6. Step 6: Final answer
    x = 92,397.20

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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.