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Finding the Fourth Proportional to 121,456.48, 167,630.44 and 89,717.44

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Solution

The fourth proportional to 121,456.48, 167,630.44 and 89,717.44 is: 123,825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,456.48 : 167,630.44 = 89,717.44 : x
  2. Step 2: Convert to fraction form
    121,456.48/167,630.44 = 89,717.44/x
  3. Step 3: Cross multiply
    121,456.48x = 167,630.44 × 89,717.44
  4. Step 4: Simplify right side
    121,456.48x = 15,039,373,942.87
  5. Step 5: Solve for x
    x = 15,039,373,942.87/121,456.48
  6. Step 6: Final answer
    x = 123,825.21

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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.