Home / 280,132.92-420,135.30-80,451.72

Finding the Fourth Proportional to 280,132.92, 420,135.30 and 80,451.72

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Solution

The fourth proportional to 280,132.92, 420,135.30 and 80,451.72 is: 120,659.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,132.92 : 420,135.30 = 80,451.72 : x
  2. Step 2: Convert to fraction form
    280,132.92/420,135.30 = 80,451.72/x
  3. Step 3: Cross multiply
    280,132.92x = 420,135.30 × 80,451.72
  4. Step 4: Simplify right side
    280,132.92x = 33,800,607,517.72
  5. Step 5: Solve for x
    x = 33,800,607,517.72/280,132.92
  6. Step 6: Final answer
    x = 120,659.18

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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.