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Finding the Fourth Proportional to 194.45, 268.34 and 111.56

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Solution

The fourth proportional to 194.45, 268.34 and 111.56 is: 153.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.45 : 268.34 = 111.56 : x
  2. Step 2: Convert to fraction form
    194.45/268.34 = 111.56/x
  3. Step 3: Cross multiply
    194.45x = 268.34 × 111.56
  4. Step 4: Simplify right side
    194.45x = 29,935.66
  5. Step 5: Solve for x
    x = 29,935.66/194.45
  6. Step 6: Final answer
    x = 153.95

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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.