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Finding the Fourth Proportional to 194.41, 268.31 and 111.55

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Solution

The fourth proportional to 194.41, 268.31 and 111.55 is: 153.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.41 : 268.31 = 111.55 : x
  2. Step 2: Convert to fraction form
    194.41/268.31 = 111.55/x
  3. Step 3: Cross multiply
    194.41x = 268.31 × 111.55
  4. Step 4: Simplify right side
    194.41x = 29,929.98
  5. Step 5: Solve for x
    x = 29,929.98/194.41
  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.