Home / 121,553.92-167,648.64-79,125.76

Finding the Fourth Proportional to 121,553.92, 167,648.64 and 79,125.76

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Solution

The fourth proportional to 121,553.92, 167,648.64 and 79,125.76 is: 109,131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,553.92 : 167,648.64 = 79,125.76 : x
  2. Step 2: Convert to fraction form
    121,553.92/167,648.64 = 79,125.76/x
  3. Step 3: Cross multiply
    121,553.92x = 167,648.64 × 79,125.76
  4. Step 4: Simplify right side
    121,553.92x = 13,265,326,052.97
  5. Step 5: Solve for x
    x = 13,265,326,052.97/121,553.92
  6. Step 6: Final answer
    x = 109,131.21

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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.