Home / 87,721.38-131,638.37-87,007.97

Finding the Fourth Proportional to 87,721.38, 131,638.37 and 87,007.97

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Solution

The fourth proportional to 87,721.38, 131,638.37 and 87,007.97 is: 130,567.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.38 : 131,638.37 = 87,007.97 : x
  2. Step 2: Convert to fraction form
    87,721.38/131,638.37 = 87,007.97/x
  3. Step 3: Cross multiply
    87,721.38x = 131,638.37 × 87,007.97
  4. Step 4: Simplify right side
    87,721.38x = 11,453,587,241.87
  5. Step 5: Solve for x
    x = 11,453,587,241.87/87,721.38
  6. Step 6: Final answer
    x = 130,567.80

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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.