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Finding the Fourth Proportional to 193.95, 267.78 and 120.38

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Solution

The fourth proportional to 193.95, 267.78 and 120.38 is: 166.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.95 : 267.78 = 120.38 : x
  2. Step 2: Convert to fraction form
    193.95/267.78 = 120.38/x
  3. Step 3: Cross multiply
    193.95x = 267.78 × 120.38
  4. Step 4: Simplify right side
    193.95x = 32,234.02
  5. Step 5: Solve for x
    x = 32,234.02/193.95
  6. Step 6: Final answer
    x = 166.20

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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.