Home / 87,921.70-131,505.74-81,540.12

Finding the Fourth Proportional to 87,921.70, 131,505.74 and 81,540.12

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Solution

The fourth proportional to 87,921.70, 131,505.74 and 81,540.12 is: 121,960.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,921.70 : 131,505.74 = 81,540.12 : x
  2. Step 2: Convert to fraction form
    87,921.70/131,505.74 = 81,540.12/x
  3. Step 3: Cross multiply
    87,921.70x = 131,505.74 × 81,540.12
  4. Step 4: Simplify right side
    87,921.70x = 10,722,993,820.29
  5. Step 5: Solve for x
    x = 10,722,993,820.29/87,921.70
  6. Step 6: Final answer
    x = 121,960.72

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1.5x scale

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.