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Finding the Fourth Proportional to 127.96, 192.69 and 115.27

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Solution

The fourth proportional to 127.96, 192.69 and 115.27 is: 173.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.96 : 192.69 = 115.27 : x
  2. Step 2: Convert to fraction form
    127.96/192.69 = 115.27/x
  3. Step 3: Cross multiply
    127.96x = 192.69 × 115.27
  4. Step 4: Simplify right side
    127.96x = 22,211.38
  5. Step 5: Solve for x
    x = 22,211.38/127.96
  6. Step 6: Final answer
    x = 173.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.