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Finding the Fourth Proportional to 121,456.72, 167,611.17 and 67,745.22

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Solution

The fourth proportional to 121,456.72, 167,611.17 and 67,745.22 is: 93,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,456.72 : 167,611.17 = 67,745.22 : x
  2. Step 2: Convert to fraction form
    121,456.72/167,611.17 = 67,745.22/x
  3. Step 3: Cross multiply
    121,456.72x = 167,611.17 × 67,745.22
  4. Step 4: Simplify right side
    121,456.72x = 11,354,855,586.11
  5. Step 5: Solve for x
    x = 11,354,855,586.11/121,456.72
  6. Step 6: Final answer
    x = 93,488.90

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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.