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Finding the Fourth Proportional to 193.95, 267.55 and 115.25

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Solution

The fourth proportional to 193.95, 267.55 and 115.25 is: 158.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.95 : 267.55 = 115.25 : x
  2. Step 2: Convert to fraction form
    193.95/267.55 = 115.25/x
  3. Step 3: Cross multiply
    193.95x = 267.55 × 115.25
  4. Step 4: Simplify right side
    193.95x = 30,834.91
  5. Step 5: Solve for x
    x = 30,834.91/193.95
  6. Step 6: Final answer
    x = 158.98

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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.