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Finding the Fourth Proportional to 181.54, 250.45 and 111.55

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Solution

The fourth proportional to 181.54, 250.45 and 111.55 is: 153.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.54 : 250.45 = 111.55 : x
  2. Step 2: Convert to fraction form
    181.54/250.45 = 111.55/x
  3. Step 3: Cross multiply
    181.54x = 250.45 × 111.55
  4. Step 4: Simplify right side
    181.54x = 27,937.70
  5. Step 5: Solve for x
    x = 27,937.70/181.54
  6. Step 6: Final answer
    x = 153.89

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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.