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Finding the Fourth Proportional to 166.25, 249.32 and 74.93

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Solution

The fourth proportional to 166.25, 249.32 and 74.93 is: 112.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.25 : 249.32 = 74.93 : x
  2. Step 2: Convert to fraction form
    166.25/249.32 = 74.93/x
  3. Step 3: Cross multiply
    166.25x = 249.32 × 74.93
  4. Step 4: Simplify right side
    166.25x = 18,679.93
  5. Step 5: Solve for x
    x = 18,679.93/166.25
  6. Step 6: Final answer
    x = 112.36

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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.