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Finding the Fourth Proportional to 127.31, 192.07 and 126.97

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Solution

The fourth proportional to 127.31, 192.07 and 126.97 is: 191.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.31 : 192.07 = 126.97 : x
  2. Step 2: Convert to fraction form
    127.31/192.07 = 126.97/x
  3. Step 3: Cross multiply
    127.31x = 192.07 × 126.97
  4. Step 4: Simplify right side
    127.31x = 24,386.81
  5. Step 5: Solve for x
    x = 24,386.81/127.31
  6. Step 6: Final answer
    x = 191.56

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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.