Home / 87,986.10-131,979.15-21,425.70

Finding the Fourth Proportional to 87,986.10, 131,979.15 and 21,425.70

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Solution

The fourth proportional to 87,986.10, 131,979.15 and 21,425.70 is: 32,138.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,986.10 : 131,979.15 = 21,425.70 : x
  2. Step 2: Convert to fraction form
    87,986.10/131,979.15 = 21,425.70/x
  3. Step 3: Cross multiply
    87,986.10x = 131,979.15 × 21,425.70
  4. Step 4: Simplify right side
    87,986.10x = 2,827,745,674.16
  5. Step 5: Solve for x
    x = 2,827,745,674.16/87,986.10
  6. Step 6: Final answer
    x = 32,138.55

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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.