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Finding the Fourth Proportional to 121,352.64, 167,472.33 and 67,638

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Solution

The fourth proportional to 121,352.64, 167,472.33 and 67,638 is: 93,343.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,352.64 : 167,472.33 = 67,638 : x
  2. Step 2: Convert to fraction form
    121,352.64/167,472.33 = 67,638/x
  3. Step 3: Cross multiply
    121,352.64x = 167,472.33 × 67,638
  4. Step 4: Simplify right side
    121,352.64x = 11,327,493,456.54
  5. Step 5: Solve for x
    x = 11,327,493,456.54/121,352.64
  6. Step 6: Final answer
    x = 93,343.61

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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.