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Finding the Fourth Proportional to 194.96, 269.21 and 125.15

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Solution

The fourth proportional to 194.96, 269.21 and 125.15 is: 172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.96 : 269.21 = 125.15 : x
  2. Step 2: Convert to fraction form
    194.96/269.21 = 125.15/x
  3. Step 3: Cross multiply
    194.96x = 269.21 × 125.15
  4. Step 4: Simplify right side
    194.96x = 33,691.63
  5. Step 5: Solve for x
    x = 33,691.63/194.96
  6. Step 6: Final answer
    x = 172.81

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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.