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Finding the Fourth Proportional to 135.62, 186.98 and 112.40

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Solution

The fourth proportional to 135.62, 186.98 and 112.40 is: 154.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.62 : 186.98 = 112.40 : x
  2. Step 2: Convert to fraction form
    135.62/186.98 = 112.40/x
  3. Step 3: Cross multiply
    135.62x = 186.98 × 112.40
  4. Step 4: Simplify right side
    135.62x = 21,016.55
  5. Step 5: Solve for x
    x = 21,016.55/135.62
  6. Step 6: Final answer
    x = 154.97

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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.