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Finding the Fourth Proportional to 121,770.33, 167,934.13 and 76,452.49

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Solution

The fourth proportional to 121,770.33, 167,934.13 and 76,452.49 is: 105,436.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,770.33 : 167,934.13 = 76,452.49 : x
  2. Step 2: Convert to fraction form
    121,770.33/167,934.13 = 76,452.49/x
  3. Step 3: Cross multiply
    121,770.33x = 167,934.13 × 76,452.49
  4. Step 4: Simplify right side
    121,770.33x = 12,838,982,394.48
  5. Step 5: Solve for x
    x = 12,838,982,394.48/121,770.33
  6. Step 6: Final answer
    x = 105,436.05

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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.