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Finding the Fourth Proportional to 166.82, 249.80 and 117.81

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Solution

The fourth proportional to 166.82, 249.80 and 117.81 is: 176.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.82 : 249.80 = 117.81 : x
  2. Step 2: Convert to fraction form
    166.82/249.80 = 117.81/x
  3. Step 3: Cross multiply
    166.82x = 249.80 × 117.81
  4. Step 4: Simplify right side
    166.82x = 29,428.79
  5. Step 5: Solve for x
    x = 29,428.79/166.82
  6. Step 6: Final answer
    x = 176.41

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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.