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Finding the Fourth Proportional to 178.80, 267.24 and 127.09

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Solution

The fourth proportional to 178.80, 267.24 and 127.09 is: 189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.80 : 267.24 = 127.09 : x
  2. Step 2: Convert to fraction form
    178.80/267.24 = 127.09/x
  3. Step 3: Cross multiply
    178.80x = 267.24 × 127.09
  4. Step 4: Simplify right side
    178.80x = 33,963.53
  5. Step 5: Solve for x
    x = 33,963.53/178.80
  6. Step 6: Final answer
    x = 189.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.