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Finding the Fourth Proportional to 194.44, 268.31 and 107.11

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Solution

The fourth proportional to 194.44, 268.31 and 107.11 is: 147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.44 : 268.31 = 107.11 : x
  2. Step 2: Convert to fraction form
    194.44/268.31 = 107.11/x
  3. Step 3: Cross multiply
    194.44x = 268.31 × 107.11
  4. Step 4: Simplify right side
    194.44x = 28,738.68
  5. Step 5: Solve for x
    x = 28,738.68/194.44
  6. Step 6: Final answer
    x = 147.80

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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.