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Finding the Fourth Proportional to 176.45, 243.41 and 126.77

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Solution

The fourth proportional to 176.45, 243.41 and 126.77 is: 174.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.45 : 243.41 = 126.77 : x
  2. Step 2: Convert to fraction form
    176.45/243.41 = 126.77/x
  3. Step 3: Cross multiply
    176.45x = 243.41 × 126.77
  4. Step 4: Simplify right side
    176.45x = 30,855.23
  5. Step 5: Solve for x
    x = 30,855.23/176.45
  6. Step 6: Final answer
    x = 174.87

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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.