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Finding the Fourth Proportional to 181.20, 249.99 and 111.22

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Solution

The fourth proportional to 181.20, 249.99 and 111.22 is: 153.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.20 : 249.99 = 111.22 : x
  2. Step 2: Convert to fraction form
    181.20/249.99 = 111.22/x
  3. Step 3: Cross multiply
    181.20x = 249.99 × 111.22
  4. Step 4: Simplify right side
    181.20x = 27,803.89
  5. Step 5: Solve for x
    x = 27,803.89/181.20
  6. Step 6: Final answer
    x = 153.44

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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.