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Finding the Fourth Proportional to 175.76, 242.66 and 126.60

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Solution

The fourth proportional to 175.76, 242.66 and 126.60 is: 174.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.76 : 242.66 = 126.60 : x
  2. Step 2: Convert to fraction form
    175.76/242.66 = 126.60/x
  3. Step 3: Cross multiply
    175.76x = 242.66 × 126.60
  4. Step 4: Simplify right side
    175.76x = 30,720.76
  5. Step 5: Solve for x
    x = 30,720.76/175.76
  6. Step 6: Final answer
    x = 174.79

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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.