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Finding the Fourth Proportional to 166.33, 249.49 and 68.81

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Solution

The fourth proportional to 166.33, 249.49 and 68.81 is: 103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.33 : 249.49 = 68.81 : x
  2. Step 2: Convert to fraction form
    166.33/249.49 = 68.81/x
  3. Step 3: Cross multiply
    166.33x = 249.49 × 68.81
  4. Step 4: Simplify right side
    166.33x = 17,165.99
  5. Step 5: Solve for x
    x = 17,165.99/166.33
  6. Step 6: Final answer
    x = 103.20

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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.