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Finding the Fourth Proportional to 73,115.10, 109,672.65 and 61,839.90

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Solution

The fourth proportional to 73,115.10, 109,672.65 and 61,839.90 is: 92,759.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,115.10 : 109,672.65 = 61,839.90 : x
  2. Step 2: Convert to fraction form
    73,115.10/109,672.65 = 61,839.90/x
  3. Step 3: Cross multiply
    73,115.10x = 109,672.65 × 61,839.90
  4. Step 4: Simplify right side
    73,115.10x = 6,782,145,708.74
  5. Step 5: Solve for x
    x = 6,782,145,708.74/73,115.10
  6. Step 6: Final answer
    x = 92,759.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.