Home / 87,701.40-131,552.10-81,286.20

Finding the Fourth Proportional to 87,701.40, 131,552.10 and 81,286.20

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Solution

The fourth proportional to 87,701.40, 131,552.10 and 81,286.20 is: 121,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,701.40 : 131,552.10 = 81,286.20 : x
  2. Step 2: Convert to fraction form
    87,701.40/131,552.10 = 81,286.20/x
  3. Step 3: Cross multiply
    87,701.40x = 131,552.10 × 81,286.20
  4. Step 4: Simplify right side
    87,701.40x = 10,693,370,311.02
  5. Step 5: Solve for x
    x = 10,693,370,311.02/87,701.40
  6. Step 6: Final answer
    x = 121,929.30

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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.