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Finding the Fourth Proportional to 87,760.67, 131,772.22 and 84,698.87

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Solution

The fourth proportional to 87,760.67, 131,772.22 and 84,698.87 is: 127,174.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,760.67 : 131,772.22 = 84,698.87 : x
  2. Step 2: Convert to fraction form
    87,760.67/131,772.22 = 84,698.87/x
  3. Step 3: Cross multiply
    87,760.67x = 131,772.22 × 84,698.87
  4. Step 4: Simplify right side
    87,760.67x = 11,160,957,260.78
  5. Step 5: Solve for x
    x = 11,160,957,260.78/87,760.67
  6. Step 6: Final answer
    x = 127,174.94

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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.