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Finding the Fourth Proportional to 141.18, 194.79 and 111.98

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Solution

The fourth proportional to 141.18, 194.79 and 111.98 is: 154.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.18 : 194.79 = 111.98 : x
  2. Step 2: Convert to fraction form
    141.18/194.79 = 111.98/x
  3. Step 3: Cross multiply
    141.18x = 194.79 × 111.98
  4. Step 4: Simplify right side
    141.18x = 21,812.58
  5. Step 5: Solve for x
    x = 21,812.58/141.18
  6. Step 6: Final answer
    x = 154.50

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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.