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Finding the Fourth Proportional to 123,229.80, 170,057.16 and 66,641.04

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Solution

The fourth proportional to 123,229.80, 170,057.16 and 66,641.04 is: 91,964.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,229.80 : 170,057.16 = 66,641.04 : x
  2. Step 2: Convert to fraction form
    123,229.80/170,057.16 = 66,641.04/x
  3. Step 3: Cross multiply
    123,229.80x = 170,057.16 × 66,641.04
  4. Step 4: Simplify right side
    123,229.80x = 11,332,786,001.85
  5. Step 5: Solve for x
    x = 11,332,786,001.85/123,229.80
  6. Step 6: Final answer
    x = 91,964.65

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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.