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Finding the Fourth Proportional to 87,660.80, 131,491.20 and 73,080.80

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Solution

The fourth proportional to 87,660.80, 131,491.20 and 73,080.80 is: 109,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,660.80 : 131,491.20 = 73,080.80 : x
  2. Step 2: Convert to fraction form
    87,660.80/131,491.20 = 73,080.80/x
  3. Step 3: Cross multiply
    87,660.80x = 131,491.20 × 73,080.80
  4. Step 4: Simplify right side
    87,660.80x = 9,609,482,088.96
  5. Step 5: Solve for x
    x = 9,609,482,088.96/87,660.80
  6. Step 6: Final answer
    x = 109,621.20

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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.