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Finding the Fourth Proportional to 181.36, 249.72 and 158.12

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Solution

The fourth proportional to 181.36, 249.72 and 158.12 is: 217.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.36 : 249.72 = 158.12 : x
  2. Step 2: Convert to fraction form
    181.36/249.72 = 158.12/x
  3. Step 3: Cross multiply
    181.36x = 249.72 × 158.12
  4. Step 4: Simplify right side
    181.36x = 39,485.73
  5. Step 5: Solve for x
    x = 39,485.73/181.36
  6. Step 6: Final answer
    x = 217.72

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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.