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Finding the Fourth Proportional to 193.19, 266.76 and 135

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Solution

The fourth proportional to 193.19, 266.76 and 135 is: 186.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.19 : 266.76 = 135 : x
  2. Step 2: Convert to fraction form
    193.19/266.76 = 135/x
  3. Step 3: Cross multiply
    193.19x = 266.76 × 135
  4. Step 4: Simplify right side
    193.19x = 36,012.60
  5. Step 5: Solve for x
    x = 36,012.60/193.19
  6. Step 6: Final answer
    x = 186.42

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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.