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Finding the Fourth Proportional to 193.84, 267.38 and 128.36

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Solution

The fourth proportional to 193.84, 267.38 and 128.36 is: 177.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.84 : 267.38 = 128.36 : x
  2. Step 2: Convert to fraction form
    193.84/267.38 = 128.36/x
  3. Step 3: Cross multiply
    193.84x = 267.38 × 128.36
  4. Step 4: Simplify right side
    193.84x = 34,320.90
  5. Step 5: Solve for x
    x = 34,320.90/193.84
  6. Step 6: Final answer
    x = 177.06

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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.