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Finding the Fourth Proportional to 181.98, 251.11 and 111.05

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Solution

The fourth proportional to 181.98, 251.11 and 111.05 is: 153.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.98 : 251.11 = 111.05 : x
  2. Step 2: Convert to fraction form
    181.98/251.11 = 111.05/x
  3. Step 3: Cross multiply
    181.98x = 251.11 × 111.05
  4. Step 4: Simplify right side
    181.98x = 27,885.59
  5. Step 5: Solve for x
    x = 27,885.59/181.98
  6. Step 6: Final answer
    x = 153.23

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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.