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Finding the Fourth Proportional to 118,781.98, 163,921.77 and 67,793.68

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Solution

The fourth proportional to 118,781.98, 163,921.77 and 67,793.68 is: 93,556.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,781.98 : 163,921.77 = 67,793.68 : x
  2. Step 2: Convert to fraction form
    118,781.98/163,921.77 = 67,793.68/x
  3. Step 3: Cross multiply
    118,781.98x = 163,921.77 × 67,793.68
  4. Step 4: Simplify right side
    118,781.98x = 11,112,860,020.41
  5. Step 5: Solve for x
    x = 11,112,860,020.41/118,781.98
  6. Step 6: Final answer
    x = 93,556.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.