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Finding the Fourth Proportional to 127.94, 176.49 and 83.66

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Solution

The fourth proportional to 127.94, 176.49 and 83.66 is: 115.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.94 : 176.49 = 83.66 : x
  2. Step 2: Convert to fraction form
    127.94/176.49 = 83.66/x
  3. Step 3: Cross multiply
    127.94x = 176.49 × 83.66
  4. Step 4: Simplify right side
    127.94x = 14,765.15
  5. Step 5: Solve for x
    x = 14,765.15/127.94
  6. Step 6: Final answer
    x = 115.41

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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.