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Finding the Fourth Proportional to 193.71, 267.33 and 115.05

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Solution

The fourth proportional to 193.71, 267.33 and 115.05 is: 158.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.71 : 267.33 = 115.05 : x
  2. Step 2: Convert to fraction form
    193.71/267.33 = 115.05/x
  3. Step 3: Cross multiply
    193.71x = 267.33 × 115.05
  4. Step 4: Simplify right side
    193.71x = 30,756.32
  5. Step 5: Solve for x
    x = 30,756.32/193.71
  6. Step 6: Final answer
    x = 158.78

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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.