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Finding the Fourth Proportional to 79,169.68, 118,743.54 and 20,001.70

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Solution

The fourth proportional to 79,169.68, 118,743.54 and 20,001.70 is: 29,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,169.68 : 118,743.54 = 20,001.70 : x
  2. Step 2: Convert to fraction form
    79,169.68/118,743.54 = 20,001.70/x
  3. Step 3: Cross multiply
    79,169.68x = 118,743.54 × 20,001.70
  4. Step 4: Simplify right side
    79,169.68x = 2,375,072,664.02
  5. Step 5: Solve for x
    x = 2,375,072,664.02/79,169.68
  6. Step 6: Final answer
    x = 29,999.78

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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.