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Finding the Fourth Proportional to 80,104.33, 120,163.33 and 20,939.91

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Solution

The fourth proportional to 80,104.33, 120,163.33 and 20,939.91 is: 31,411.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,104.33 : 120,163.33 = 20,939.91 : x
  2. Step 2: Convert to fraction form
    80,104.33/120,163.33 = 20,939.91/x
  3. Step 3: Cross multiply
    80,104.33x = 120,163.33 × 20,939.91
  4. Step 4: Simplify right side
    80,104.33x = 2,516,208,891.06
  5. Step 5: Solve for x
    x = 2,516,208,891.06/80,104.33
  6. Step 6: Final answer
    x = 31,411.65

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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.