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Finding the Fourth Proportional to 80,614.11, 120,920.99 and 21,449.79

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Solution

The fourth proportional to 80,614.11, 120,920.99 and 21,449.79 is: 32,174.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,614.11 : 120,920.99 = 21,449.79 : x
  2. Step 2: Convert to fraction form
    80,614.11/120,920.99 = 21,449.79/x
  3. Step 3: Cross multiply
    80,614.11x = 120,920.99 × 21,449.79
  4. Step 4: Simplify right side
    80,614.11x = 2,593,729,734.84
  5. Step 5: Solve for x
    x = 2,593,729,734.84/80,614.11
  6. Step 6: Final answer
    x = 32,174.64

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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.