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Finding the Fourth Proportional to 123,480.54, 170,402.07 and 66,891.93

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Solution

The fourth proportional to 123,480.54, 170,402.07 and 66,891.93 is: 92,310.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,480.54 : 170,402.07 = 66,891.93 : x
  2. Step 2: Convert to fraction form
    123,480.54/170,402.07 = 66,891.93/x
  3. Step 3: Cross multiply
    123,480.54x = 170,402.07 × 66,891.93
  4. Step 4: Simplify right side
    123,480.54x = 11,398,523,338.30
  5. Step 5: Solve for x
    x = 11,398,523,338.30/123,480.54
  6. Step 6: Final answer
    x = 92,310.28

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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.