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Finding the Fourth Proportional to 181.20, 249.98 and 111.25

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Solution

The fourth proportional to 181.20, 249.98 and 111.25 is: 153.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.20 : 249.98 = 111.25 : x
  2. Step 2: Convert to fraction form
    181.20/249.98 = 111.25/x
  3. Step 3: Cross multiply
    181.20x = 249.98 × 111.25
  4. Step 4: Simplify right side
    181.20x = 27,810.28
  5. Step 5: Solve for x
    x = 27,810.28/181.20
  6. Step 6: Final answer
    x = 153.48

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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.