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Finding the Fourth Proportional to 80,155.80, 120,233.70 and 20,997.45

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Solution

The fourth proportional to 80,155.80, 120,233.70 and 20,997.45 is: 31,496.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,155.80 : 120,233.70 = 20,997.45 : x
  2. Step 2: Convert to fraction form
    80,155.80/120,233.70 = 20,997.45/x
  3. Step 3: Cross multiply
    80,155.80x = 120,233.70 × 20,997.45
  4. Step 4: Simplify right side
    80,155.80x = 2,524,601,104.07
  5. Step 5: Solve for x
    x = 2,524,601,104.07/80,155.80
  6. Step 6: Final answer
    x = 31,496.18

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Similar ratio
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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.