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Finding the Fourth Proportional to 87,281.40, 130,922.10 and 80,866.20

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Solution

The fourth proportional to 87,281.40, 130,922.10 and 80,866.20 is: 121,299.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,281.40 : 130,922.10 = 80,866.20 : x
  2. Step 2: Convert to fraction form
    87,281.40/130,922.10 = 80,866.20/x
  3. Step 3: Cross multiply
    87,281.40x = 130,922.10 × 80,866.20
  4. Step 4: Simplify right side
    87,281.40x = 10,587,172,723.02
  5. Step 5: Solve for x
    x = 10,587,172,723.02/87,281.40
  6. Step 6: Final answer
    x = 121,299.30

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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.