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Finding the Fourth Proportional to 80,785.30, 121,177.95 and 45,793.30

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Solution

The fourth proportional to 80,785.30, 121,177.95 and 45,793.30 is: 68,689.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,785.30 : 121,177.95 = 45,793.30 : x
  2. Step 2: Convert to fraction form
    80,785.30/121,177.95 = 45,793.30/x
  3. Step 3: Cross multiply
    80,785.30x = 121,177.95 × 45,793.30
  4. Step 4: Simplify right side
    80,785.30x = 5,549,138,217.74
  5. Step 5: Solve for x
    x = 5,549,138,217.74/80,785.30
  6. Step 6: Final answer
    x = 68,689.95

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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.