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Finding the Fourth Proportional to 166.41, 249.21 and 127.80

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Solution

The fourth proportional to 166.41, 249.21 and 127.80 is: 191.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.41 : 249.21 = 127.80 : x
  2. Step 2: Convert to fraction form
    166.41/249.21 = 127.80/x
  3. Step 3: Cross multiply
    166.41x = 249.21 × 127.80
  4. Step 4: Simplify right side
    166.41x = 31,849.04
  5. Step 5: Solve for x
    x = 31,849.04/166.41
  6. Step 6: Final answer
    x = 191.39

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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.