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Finding the Fourth Proportional to 193.49, 290.13 and 111.20

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Solution

The fourth proportional to 193.49, 290.13 and 111.20 is: 166.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.49 : 290.13 = 111.20 : x
  2. Step 2: Convert to fraction form
    193.49/290.13 = 111.20/x
  3. Step 3: Cross multiply
    193.49x = 290.13 × 111.20
  4. Step 4: Simplify right side
    193.49x = 32,263.13
  5. Step 5: Solve for x
    x = 32,263.13/193.49
  6. Step 6: Final answer
    x = 166.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.