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Finding the Fourth Proportional to 181.10, 249.90 and 103.47

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Solution

The fourth proportional to 181.10, 249.90 and 103.47 is: 142.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.10 : 249.90 = 103.47 : x
  2. Step 2: Convert to fraction form
    181.10/249.90 = 103.47/x
  3. Step 3: Cross multiply
    181.10x = 249.90 × 103.47
  4. Step 4: Simplify right side
    181.10x = 25,857.15
  5. Step 5: Solve for x
    x = 25,857.15/181.10
  6. Step 6: Final answer
    x = 142.78

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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.