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Finding the Fourth Proportional to 193.80, 267.45 and 105.29

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Solution

The fourth proportional to 193.80, 267.45 and 105.29 is: 145.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.80 : 267.45 = 105.29 : x
  2. Step 2: Convert to fraction form
    193.80/267.45 = 105.29/x
  3. Step 3: Cross multiply
    193.80x = 267.45 × 105.29
  4. Step 4: Simplify right side
    193.80x = 28,158.60
  5. Step 5: Solve for x
    x = 28,158.60/193.80
  6. Step 6: Final answer
    x = 145.29

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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.