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Finding the Fourth Proportional to 141.36, 211.97 and 45.14

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Solution

The fourth proportional to 141.36, 211.97 and 45.14 is: 67.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.36 : 211.97 = 45.14 : x
  2. Step 2: Convert to fraction form
    141.36/211.97 = 45.14/x
  3. Step 3: Cross multiply
    141.36x = 211.97 × 45.14
  4. Step 4: Simplify right side
    141.36x = 9,568.33
  5. Step 5: Solve for x
    x = 9,568.33/141.36
  6. Step 6: Final answer
    x = 67.69

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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.