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Finding the Fourth Proportional to 181.12, 251.13 and 171.40

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Solution

The fourth proportional to 181.12, 251.13 and 171.40 is: 237.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.12 : 251.13 = 171.40 : x
  2. Step 2: Convert to fraction form
    181.12/251.13 = 171.40/x
  3. Step 3: Cross multiply
    181.12x = 251.13 × 171.40
  4. Step 4: Simplify right side
    181.12x = 43,043.68
  5. Step 5: Solve for x
    x = 43,043.68/181.12
  6. Step 6: Final answer
    x = 237.65

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.