Home / 87,711.20-131,568-28,547.12

Finding the Fourth Proportional to 87,711.20, 131,568 and 28,547.12

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Solution

The fourth proportional to 87,711.20, 131,568 and 28,547.12 is: 42,821.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,711.20 : 131,568 = 28,547.12 : x
  2. Step 2: Convert to fraction form
    87,711.20/131,568 = 28,547.12/x
  3. Step 3: Cross multiply
    87,711.20x = 131,568 × 28,547.12
  4. Step 4: Simplify right side
    87,711.20x = 3,755,887,484.16
  5. Step 5: Solve for x
    x = 3,755,887,484.16/87,711.20
  6. Step 6: Final answer
    x = 42,821.07

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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.