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Finding the Fourth Proportional to 54,700.70, 82,115.85 and 54,311.90

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Solution

The fourth proportional to 54,700.70, 82,115.85 and 54,311.90 is: 81,532.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,700.70 : 82,115.85 = 54,311.90 : x
  2. Step 2: Convert to fraction form
    54,700.70/82,115.85 = 54,311.90/x
  3. Step 3: Cross multiply
    54,700.70x = 82,115.85 × 54,311.90
  4. Step 4: Simplify right side
    54,700.70x = 4,459,867,833.62
  5. Step 5: Solve for x
    x = 4,459,867,833.62/54,700.70
  6. Step 6: Final answer
    x = 81,532.19

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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.