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Finding the Fourth Proportional to 166.81, 250.22 and 126.31

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Solution

The fourth proportional to 166.81, 250.22 and 126.31 is: 189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.81 : 250.22 = 126.31 : x
  2. Step 2: Convert to fraction form
    166.81/250.22 = 126.31/x
  3. Step 3: Cross multiply
    166.81x = 250.22 × 126.31
  4. Step 4: Simplify right side
    166.81x = 31,605.29
  5. Step 5: Solve for x
    x = 31,605.29/166.81
  6. Step 6: Final answer
    x = 189.47

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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.