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Finding the Fourth Proportional to 168,781.80, 252,881.10 and 79,843.80

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Solution

The fourth proportional to 168,781.80, 252,881.10 and 79,843.80 is: 119,627.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,781.80 : 252,881.10 = 79,843.80 : x
  2. Step 2: Convert to fraction form
    168,781.80/252,881.10 = 79,843.80/x
  3. Step 3: Cross multiply
    168,781.80x = 252,881.10 × 79,843.80
  4. Step 4: Simplify right side
    168,781.80x = 20,190,987,972.18
  5. Step 5: Solve for x
    x = 20,190,987,972.18/168,781.80
  6. Step 6: Final answer
    x = 119,627.76

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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.