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Finding the Fourth Proportional to 121,932.41, 168,324.25 and 91,729.25

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Solution

The fourth proportional to 121,932.41, 168,324.25 and 91,729.25 is: 126,629.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,932.41 : 168,324.25 = 91,729.25 : x
  2. Step 2: Convert to fraction form
    121,932.41/168,324.25 = 91,729.25/x
  3. Step 3: Cross multiply
    121,932.41x = 168,324.25 × 91,729.25
  4. Step 4: Simplify right side
    121,932.41x = 15,440,257,400.80
  5. Step 5: Solve for x
    x = 15,440,257,400.80/121,932.41
  6. Step 6: Final answer
    x = 126,629.65

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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.