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Finding the Fourth Proportional to 176.55, 243.40 and 126.73

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Solution

The fourth proportional to 176.55, 243.40 and 126.73 is: 174.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.55 : 243.40 = 126.73 : x
  2. Step 2: Convert to fraction form
    176.55/243.40 = 126.73/x
  3. Step 3: Cross multiply
    176.55x = 243.40 × 126.73
  4. Step 4: Simplify right side
    176.55x = 30,846.08
  5. Step 5: Solve for x
    x = 30,846.08/176.55
  6. Step 6: Final answer
    x = 174.72

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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.