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Finding the Fourth Proportional to 80,845.80, 121,351.45 and 66,760.95

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Solution

The fourth proportional to 80,845.80, 121,351.45 and 66,760.95 is: 100,209.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,845.80 : 121,351.45 = 66,760.95 : x
  2. Step 2: Convert to fraction form
    80,845.80/121,351.45 = 66,760.95/x
  3. Step 3: Cross multiply
    80,845.80x = 121,351.45 × 66,760.95
  4. Step 4: Simplify right side
    80,845.80x = 8,101,537,463.91
  5. Step 5: Solve for x
    x = 8,101,537,463.91/80,845.80
  6. Step 6: Final answer
    x = 100,209.76

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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.