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Finding the Fourth Proportional to 176.62, 243.43 and 126.76

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Solution

The fourth proportional to 176.62, 243.43 and 126.76 is: 174.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.62 : 243.43 = 126.76 : x
  2. Step 2: Convert to fraction form
    176.62/243.43 = 126.76/x
  3. Step 3: Cross multiply
    176.62x = 243.43 × 126.76
  4. Step 4: Simplify right side
    176.62x = 30,857.19
  5. Step 5: Solve for x
    x = 30,857.19/176.62
  6. Step 6: Final answer
    x = 174.71

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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.