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Finding the Fourth Proportional to 80,408.10, 120,612.15 and 67,383.30

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Solution

The fourth proportional to 80,408.10, 120,612.15 and 67,383.30 is: 101,074.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,408.10 : 120,612.15 = 67,383.30 : x
  2. Step 2: Convert to fraction form
    80,408.10/120,612.15 = 67,383.30/x
  3. Step 3: Cross multiply
    80,408.10x = 120,612.15 × 67,383.30
  4. Step 4: Simplify right side
    80,408.10x = 8,127,244,687.10
  5. Step 5: Solve for x
    x = 8,127,244,687.10/80,408.10
  6. Step 6: Final answer
    x = 101,074.95

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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.