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Finding the Fourth Proportional to 79,906.86, 119,913.80 and 33,159.78

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Solution

The fourth proportional to 79,906.86, 119,913.80 and 33,159.78 is: 49,761.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,906.86 : 119,913.80 = 33,159.78 : x
  2. Step 2: Convert to fraction form
    79,906.86/119,913.80 = 33,159.78/x
  3. Step 3: Cross multiply
    79,906.86x = 119,913.80 × 33,159.78
  4. Step 4: Simplify right side
    79,906.86x = 3,976,315,226.96
  5. Step 5: Solve for x
    x = 3,976,315,226.96/79,906.86
  6. Step 6: Final answer
    x = 49,761.88

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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.