Home / 87,685.56-131,528.38-81,387

Finding the Fourth Proportional to 87,685.56, 131,528.38 and 81,387

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Solution

The fourth proportional to 87,685.56, 131,528.38 and 81,387 is: 122,080.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,685.56 : 131,528.38 = 81,387 : x
  2. Step 2: Convert to fraction form
    87,685.56/131,528.38 = 81,387/x
  3. Step 3: Cross multiply
    87,685.56x = 131,528.38 × 81,387
  4. Step 4: Simplify right side
    87,685.56x = 10,704,700,263.06
  5. Step 5: Solve for x
    x = 10,704,700,263.06/87,685.56
  6. Step 6: Final answer
    x = 122,080.54

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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.