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Finding the Fourth Proportional to 166.22, 249.24 and 79.48

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Solution

The fourth proportional to 166.22, 249.24 and 79.48 is: 119.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.22 : 249.24 = 79.48 : x
  2. Step 2: Convert to fraction form
    166.22/249.24 = 79.48/x
  3. Step 3: Cross multiply
    166.22x = 249.24 × 79.48
  4. Step 4: Simplify right side
    166.22x = 19,810.20
  5. Step 5: Solve for x
    x = 19,810.20/166.22
  6. Step 6: Final answer
    x = 119.18

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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.