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Finding the Fourth Proportional to 80,019.68, 120,104.82 and 40,605.08

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Solution

The fourth proportional to 80,019.68, 120,104.82 and 40,605.08 is: 60,945.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,019.68 : 120,104.82 = 40,605.08 : x
  2. Step 2: Convert to fraction form
    80,019.68/120,104.82 = 40,605.08/x
  3. Step 3: Cross multiply
    80,019.68x = 120,104.82 × 40,605.08
  4. Step 4: Simplify right side
    80,019.68x = 4,876,865,223.96
  5. Step 5: Solve for x
    x = 4,876,865,223.96/80,019.68
  6. Step 6: Final answer
    x = 60,945.83

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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.