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Finding the Fourth Proportional to 141.61, 195.44 and 86.38

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Solution

The fourth proportional to 141.61, 195.44 and 86.38 is: 119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.61 : 195.44 = 86.38 : x
  2. Step 2: Convert to fraction form
    141.61/195.44 = 86.38/x
  3. Step 3: Cross multiply
    141.61x = 195.44 × 86.38
  4. Step 4: Simplify right side
    141.61x = 16,882.11
  5. Step 5: Solve for x
    x = 16,882.11/141.61
  6. Step 6: Final answer
    x = 119.22

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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.