Home / 80,836.80-121,255.20-74,931.90

Finding the Fourth Proportional to 80,836.80, 121,255.20 and 74,931.90

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Solution

The fourth proportional to 80,836.80, 121,255.20 and 74,931.90 is: 112,397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,836.80 : 121,255.20 = 74,931.90 : x
  2. Step 2: Convert to fraction form
    80,836.80/121,255.20 = 74,931.90/x
  3. Step 3: Cross multiply
    80,836.80x = 121,255.20 × 74,931.90
  4. Step 4: Simplify right side
    80,836.80x = 9,085,882,520.88
  5. Step 5: Solve for x
    x = 9,085,882,520.88/80,836.80
  6. Step 6: Final answer
    x = 112,397.85

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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.