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Finding the Fourth Proportional to 194.35, 268.19 and 111.45

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Solution

The fourth proportional to 194.35, 268.19 and 111.45 is: 153.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.35 : 268.19 = 111.45 : x
  2. Step 2: Convert to fraction form
    194.35/268.19 = 111.45/x
  3. Step 3: Cross multiply
    194.35x = 268.19 × 111.45
  4. Step 4: Simplify right side
    194.35x = 29,888.43
  5. Step 5: Solve for x
    x = 29,888.43/194.35
  6. Step 6: Final answer
    x = 153.79

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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.