Home / 87,921.95-131,506.13-81,540.36

Finding the Fourth Proportional to 87,921.95, 131,506.13 and 81,540.36

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Solution

The fourth proportional to 87,921.95, 131,506.13 and 81,540.36 is: 121,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,921.95 : 131,506.13 = 81,540.36 : x
  2. Step 2: Convert to fraction form
    87,921.95/131,506.13 = 81,540.36/x
  3. Step 3: Cross multiply
    87,921.95x = 131,506.13 × 81,540.36
  4. Step 4: Simplify right side
    87,921.95x = 10,723,057,386.26
  5. Step 5: Solve for x
    x = 10,723,057,386.26/87,921.95
  6. Step 6: Final answer
    x = 121,961.10

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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.