Home / 87,986.60-131,979.90-21,426.20

Finding the Fourth Proportional to 87,986.60, 131,979.90 and 21,426.20

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Solution

The fourth proportional to 87,986.60, 131,979.90 and 21,426.20 is: 32,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,986.60 : 131,979.90 = 21,426.20 : x
  2. Step 2: Convert to fraction form
    87,986.60/131,979.90 = 21,426.20/x
  3. Step 3: Cross multiply
    87,986.60x = 131,979.90 × 21,426.20
  4. Step 4: Simplify right side
    87,986.60x = 2,827,827,733.38
  5. Step 5: Solve for x
    x = 2,827,827,733.38/87,986.60
  6. Step 6: Final answer
    x = 32,139.30

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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.