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Finding the Fourth Proportional to 193.14, 266.55 and 115.50

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Solution

The fourth proportional to 193.14, 266.55 and 115.50 is: 159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.14 : 266.55 = 115.50 : x
  2. Step 2: Convert to fraction form
    193.14/266.55 = 115.50/x
  3. Step 3: Cross multiply
    193.14x = 266.55 × 115.50
  4. Step 4: Simplify right side
    193.14x = 30,786.53
  5. Step 5: Solve for x
    x = 30,786.53/193.14
  6. Step 6: Final answer
    x = 159.40

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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.