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Finding the Fourth Proportional to 121,481.53, 167,644.56 and 67,766.38

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Solution

The fourth proportional to 121,481.53, 167,644.56 and 67,766.38 is: 93,517.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,481.53 : 167,644.56 = 67,766.38 : x
  2. Step 2: Convert to fraction form
    121,481.53/167,644.56 = 67,766.38/x
  3. Step 3: Cross multiply
    121,481.53x = 167,644.56 × 67,766.38
  4. Step 4: Simplify right side
    121,481.53x = 11,360,664,957.89
  5. Step 5: Solve for x
    x = 11,360,664,957.89/121,481.53
  6. Step 6: Final answer
    x = 93,517.63

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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.