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Finding the Fourth Proportional to 166.68, 249.72 and 154.80

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Solution

The fourth proportional to 166.68, 249.72 and 154.80 is: 231.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.68 : 249.72 = 154.80 : x
  2. Step 2: Convert to fraction form
    166.68/249.72 = 154.80/x
  3. Step 3: Cross multiply
    166.68x = 249.72 × 154.80
  4. Step 4: Simplify right side
    166.68x = 38,656.66
  5. Step 5: Solve for x
    x = 38,656.66/166.68
  6. Step 6: Final answer
    x = 231.92

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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.