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Finding the Fourth Proportional to 181.99, 251.11 and 107.31

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Solution

The fourth proportional to 181.99, 251.11 and 107.31 is: 148.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.99 : 251.11 = 107.31 : x
  2. Step 2: Convert to fraction form
    181.99/251.11 = 107.31/x
  3. Step 3: Cross multiply
    181.99x = 251.11 × 107.31
  4. Step 4: Simplify right side
    181.99x = 26,945.54
  5. Step 5: Solve for x
    x = 26,945.54/181.99
  6. Step 6: Final answer
    x = 148.06

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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.