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Finding the Fourth Proportional to 181.89, 251.12 and 135.21

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Solution

The fourth proportional to 181.89, 251.12 and 135.21 is: 186.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.89 : 251.12 = 135.21 : x
  2. Step 2: Convert to fraction form
    181.89/251.12 = 135.21/x
  3. Step 3: Cross multiply
    181.89x = 251.12 × 135.21
  4. Step 4: Simplify right side
    181.89x = 33,952.57
  5. Step 5: Solve for x
    x = 33,952.57/181.89
  6. Step 6: Final answer
    x = 186.67

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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.