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Finding the Fourth Proportional to 123,527.62, 170,468.11 and 66,939

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Solution

The fourth proportional to 123,527.62, 170,468.11 and 66,939 is: 92,375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,527.62 : 170,468.11 = 66,939 : x
  2. Step 2: Convert to fraction form
    123,527.62/170,468.11 = 66,939/x
  3. Step 3: Cross multiply
    123,527.62x = 170,468.11 × 66,939
  4. Step 4: Simplify right side
    123,527.62x = 11,410,964,815.29
  5. Step 5: Solve for x
    x = 11,410,964,815.29/123,527.62
  6. Step 6: Final answer
    x = 92,375.82

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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.