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Finding the Fourth Proportional to 123,179.72, 169,987.92 and 66,591.08

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Solution

The fourth proportional to 123,179.72, 169,987.92 and 66,591.08 is: 91,895.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,179.72 : 169,987.92 = 66,591.08 : x
  2. Step 2: Convert to fraction form
    123,179.72/169,987.92 = 66,591.08/x
  3. Step 3: Cross multiply
    123,179.72x = 169,987.92 × 66,591.08
  4. Step 4: Simplify right side
    123,179.72x = 11,319,679,179.75
  5. Step 5: Solve for x
    x = 11,319,679,179.75/123,179.72
  6. Step 6: Final answer
    x = 91,895.64

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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.