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Finding the Fourth Proportional to 132,120, 198,180 and 38,625.75

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Solution

The fourth proportional to 132,120, 198,180 and 38,625.75 is: 57,938.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,120 : 198,180 = 38,625.75 : x
  2. Step 2: Convert to fraction form
    132,120/198,180 = 38,625.75/x
  3. Step 3: Cross multiply
    132,120x = 198,180 × 38,625.75
  4. Step 4: Simplify right side
    132,120x = 7,654,851,135
  5. Step 5: Solve for x
    x = 7,654,851,135/132,120
  6. Step 6: Final answer
    x = 57,938.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.