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Finding the Fourth Proportional to 84,617.92, 126,640.79 and 82,340.89

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Solution

The fourth proportional to 84,617.92, 126,640.79 and 82,340.89 is: 123,232.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,617.92 : 126,640.79 = 82,340.89 : x
  2. Step 2: Convert to fraction form
    84,617.92/126,640.79 = 82,340.89/x
  3. Step 3: Cross multiply
    84,617.92x = 126,640.79 × 82,340.89
  4. Step 4: Simplify right side
    84,617.92x = 10,427,715,358.90
  5. Step 5: Solve for x
    x = 10,427,715,358.90/84,617.92
  6. Step 6: Final answer
    x = 123,232.94

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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.