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Finding the Fourth Proportional to 181.98, 251.25 and 126.70

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Solution

The fourth proportional to 181.98, 251.25 and 126.70 is: 174.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.98 : 251.25 = 126.70 : x
  2. Step 2: Convert to fraction form
    181.98/251.25 = 126.70/x
  3. Step 3: Cross multiply
    181.98x = 251.25 × 126.70
  4. Step 4: Simplify right side
    181.98x = 31,833.38
  5. Step 5: Solve for x
    x = 31,833.38/181.98
  6. Step 6: Final answer
    x = 174.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.