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Finding the Fourth Proportional to 80,131.32, 120,203.82 and 20,966.94

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Solution

The fourth proportional to 80,131.32, 120,203.82 and 20,966.94 is: 31,452.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,131.32 : 120,203.82 = 20,966.94 : x
  2. Step 2: Convert to fraction form
    80,131.32/120,203.82 = 20,966.94/x
  3. Step 3: Cross multiply
    80,131.32x = 120,203.82 × 20,966.94
  4. Step 4: Simplify right side
    80,131.32x = 2,520,306,281.71
  5. Step 5: Solve for x
    x = 2,520,306,281.71/80,131.32
  6. Step 6: Final answer
    x = 31,452.20

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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.