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Finding the Fourth Proportional to 177.49, 266.27 and 67.78

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Solution

The fourth proportional to 177.49, 266.27 and 67.78 is: 101.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.49 : 266.27 = 67.78 : x
  2. Step 2: Convert to fraction form
    177.49/266.27 = 67.78/x
  3. Step 3: Cross multiply
    177.49x = 266.27 × 67.78
  4. Step 4: Simplify right side
    177.49x = 18,047.78
  5. Step 5: Solve for x
    x = 18,047.78/177.49
  6. Step 6: Final answer
    x = 101.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.