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Finding the Fourth Proportional to 193.53, 266.79 and 119.81

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Solution

The fourth proportional to 193.53, 266.79 and 119.81 is: 165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.53 : 266.79 = 119.81 : x
  2. Step 2: Convert to fraction form
    193.53/266.79 = 119.81/x
  3. Step 3: Cross multiply
    193.53x = 266.79 × 119.81
  4. Step 4: Simplify right side
    193.53x = 31,964.11
  5. Step 5: Solve for x
    x = 31,964.11/193.53
  6. Step 6: Final answer
    x = 165.16

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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.