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Finding the Fourth Proportional to 181.95, 251.20 and 126.82

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Solution

The fourth proportional to 181.95, 251.20 and 126.82 is: 175.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.95 : 251.20 = 126.82 : x
  2. Step 2: Convert to fraction form
    181.95/251.20 = 126.82/x
  3. Step 3: Cross multiply
    181.95x = 251.20 × 126.82
  4. Step 4: Simplify right side
    181.95x = 31,856.24
  5. Step 5: Solve for x
    x = 31,856.24/181.95
  6. Step 6: Final answer
    x = 175.09

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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.