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Finding the Fourth Proportional to 193.87, 267.61 and 138.64

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Solution

The fourth proportional to 193.87, 267.61 and 138.64 is: 191.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.87 : 267.61 = 138.64 : x
  2. Step 2: Convert to fraction form
    193.87/267.61 = 138.64/x
  3. Step 3: Cross multiply
    193.87x = 267.61 × 138.64
  4. Step 4: Simplify right side
    193.87x = 37,101.45
  5. Step 5: Solve for x
    x = 37,101.45/193.87
  6. Step 6: Final answer
    x = 191.37

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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.