Home / 128,276.10-192,414.15-45,159.30

Finding the Fourth Proportional to 128,276.10, 192,414.15 and 45,159.30

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Solution

The fourth proportional to 128,276.10, 192,414.15 and 45,159.30 is: 67,738.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,276.10 : 192,414.15 = 45,159.30 : x
  2. Step 2: Convert to fraction form
    128,276.10/192,414.15 = 45,159.30/x
  3. Step 3: Cross multiply
    128,276.10x = 192,414.15 × 45,159.30
  4. Step 4: Simplify right side
    128,276.10x = 8,689,288,324.10
  5. Step 5: Solve for x
    x = 8,689,288,324.10/128,276.10
  6. Step 6: Final answer
    x = 67,738.95

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Similar ratio
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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.