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Finding the Fourth Proportional to 127.54, 191.40 and 95.14

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Solution

The fourth proportional to 127.54, 191.40 and 95.14 is: 142.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.54 : 191.40 = 95.14 : x
  2. Step 2: Convert to fraction form
    127.54/191.40 = 95.14/x
  3. Step 3: Cross multiply
    127.54x = 191.40 × 95.14
  4. Step 4: Simplify right side
    127.54x = 18,209.80
  5. Step 5: Solve for x
    x = 18,209.80/127.54
  6. Step 6: Final answer
    x = 142.78

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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.