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Finding the Fourth Proportional to 193.36, 266.82 and 115.72

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Solution

The fourth proportional to 193.36, 266.82 and 115.72 is: 159.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.36 : 266.82 = 115.72 : x
  2. Step 2: Convert to fraction form
    193.36/266.82 = 115.72/x
  3. Step 3: Cross multiply
    193.36x = 266.82 × 115.72
  4. Step 4: Simplify right side
    193.36x = 30,876.41
  5. Step 5: Solve for x
    x = 30,876.41/193.36
  6. Step 6: Final answer
    x = 159.68

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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.