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Finding the Fourth Proportional to 141.71, 195.57 and 86.48

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Solution

The fourth proportional to 141.71, 195.57 and 86.48 is: 119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.71 : 195.57 = 86.48 : x
  2. Step 2: Convert to fraction form
    141.71/195.57 = 86.48/x
  3. Step 3: Cross multiply
    141.71x = 195.57 × 86.48
  4. Step 4: Simplify right side
    141.71x = 16,912.97
  5. Step 5: Solve for x
    x = 16,912.97/141.71
  6. Step 6: Final answer
    x = 119.35

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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.