Home / 87,819.20-131,421.60-80,446.40

Finding the Fourth Proportional to 87,819.20, 131,421.60 and 80,446.40

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Solution

The fourth proportional to 87,819.20, 131,421.60 and 80,446.40 is: 120,388.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,819.20 : 131,421.60 = 80,446.40 : x
  2. Step 2: Convert to fraction form
    87,819.20/131,421.60 = 80,446.40/x
  3. Step 3: Cross multiply
    87,819.20x = 131,421.60 × 80,446.40
  4. Step 4: Simplify right side
    87,819.20x = 10,572,394,602.24
  5. Step 5: Solve for x
    x = 10,572,394,602.24/87,819.20
  6. Step 6: Final answer
    x = 120,388.19

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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.