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Finding the Fourth Proportional to 181.70, 250.68 and 111.72

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Solution

The fourth proportional to 181.70, 250.68 and 111.72 is: 154.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.70 : 250.68 = 111.72 : x
  2. Step 2: Convert to fraction form
    181.70/250.68 = 111.72/x
  3. Step 3: Cross multiply
    181.70x = 250.68 × 111.72
  4. Step 4: Simplify right side
    181.70x = 28,005.97
  5. Step 5: Solve for x
    x = 28,005.97/181.70
  6. Step 6: Final answer
    x = 154.13

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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.