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Finding the Fourth Proportional to 141.95, 196.09 and 109.61

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Solution

The fourth proportional to 141.95, 196.09 and 109.61 is: 151.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.95 : 196.09 = 109.61 : x
  2. Step 2: Convert to fraction form
    141.95/196.09 = 109.61/x
  3. Step 3: Cross multiply
    141.95x = 196.09 × 109.61
  4. Step 4: Simplify right side
    141.95x = 21,494.05
  5. Step 5: Solve for x
    x = 21,494.05/141.95
  6. Step 6: Final answer
    x = 151.42

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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.