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Finding the Fourth Proportional to 141.63, 212.27 and 121.29

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Solution

The fourth proportional to 141.63, 212.27 and 121.29 is: 181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.63 : 212.27 = 121.29 : x
  2. Step 2: Convert to fraction form
    141.63/212.27 = 121.29/x
  3. Step 3: Cross multiply
    141.63x = 212.27 × 121.29
  4. Step 4: Simplify right side
    141.63x = 25,745.62
  5. Step 5: Solve for x
    x = 25,745.62/141.63
  6. Step 6: Final answer
    x = 181.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.