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Finding the Fourth Proportional to 80,611.67, 120,920.20 and 36,238.55

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Solution

The fourth proportional to 80,611.67, 120,920.20 and 36,238.55 is: 54,359.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,611.67 : 120,920.20 = 36,238.55 : x
  2. Step 2: Convert to fraction form
    80,611.67/120,920.20 = 36,238.55/x
  3. Step 3: Cross multiply
    80,611.67x = 120,920.20 × 36,238.55
  4. Step 4: Simplify right side
    80,611.67x = 4,381,972,713.71
  5. Step 5: Solve for x
    x = 4,381,972,713.71/80,611.67
  6. Step 6: Final answer
    x = 54,359.04

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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.