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Finding the Fourth Proportional to 80,520.70, 120,781.05 and 56,901.10

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Solution

The fourth proportional to 80,520.70, 120,781.05 and 56,901.10 is: 85,351.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,520.70 : 120,781.05 = 56,901.10 : x
  2. Step 2: Convert to fraction form
    80,520.70/120,781.05 = 56,901.10/x
  3. Step 3: Cross multiply
    80,520.70x = 120,781.05 × 56,901.10
  4. Step 4: Simplify right side
    80,520.70x = 6,872,574,604.16
  5. Step 5: Solve for x
    x = 6,872,574,604.16/80,520.70
  6. Step 6: Final answer
    x = 85,351.65

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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.