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Finding the Fourth Proportional to 194.05, 267.78 and 111.15

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Solution

The fourth proportional to 194.05, 267.78 and 111.15 is: 153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.05 : 267.78 = 111.15 : x
  2. Step 2: Convert to fraction form
    194.05/267.78 = 111.15/x
  3. Step 3: Cross multiply
    194.05x = 267.78 × 111.15
  4. Step 4: Simplify right side
    194.05x = 29,763.75
  5. Step 5: Solve for x
    x = 29,763.75/194.05
  6. Step 6: Final answer
    x = 153.39

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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.