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Finding the Fourth Proportional to 195.31, 269.46 and 129.82

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Solution

The fourth proportional to 195.31, 269.46 and 129.82 is: 179.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.31 : 269.46 = 129.82 : x
  2. Step 2: Convert to fraction form
    195.31/269.46 = 129.82/x
  3. Step 3: Cross multiply
    195.31x = 269.46 × 129.82
  4. Step 4: Simplify right side
    195.31x = 34,981.30
  5. Step 5: Solve for x
    x = 34,981.30/195.31
  6. Step 6: Final answer
    x = 179.11

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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.