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Finding the Fourth Proportional to 215,752.28, 323,631.17 and 82,640.52

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Solution

The fourth proportional to 215,752.28, 323,631.17 and 82,640.52 is: 123,961.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,752.28 : 323,631.17 = 82,640.52 : x
  2. Step 2: Convert to fraction form
    215,752.28/323,631.17 = 82,640.52/x
  3. Step 3: Cross multiply
    215,752.28x = 323,631.17 × 82,640.52
  4. Step 4: Simplify right side
    215,752.28x = 26,745,047,763.81
  5. Step 5: Solve for x
    x = 26,745,047,763.81/215,752.28
  6. Step 6: Final answer
    x = 123,961.83

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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.