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Finding the Fourth Proportional to 135.46, 186.96 and 80.18

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Solution

The fourth proportional to 135.46, 186.96 and 80.18 is: 110.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.46 : 186.96 = 80.18 : x
  2. Step 2: Convert to fraction form
    135.46/186.96 = 80.18/x
  3. Step 3: Cross multiply
    135.46x = 186.96 × 80.18
  4. Step 4: Simplify right side
    135.46x = 14,990.45
  5. Step 5: Solve for x
    x = 14,990.45/135.46
  6. Step 6: Final answer
    x = 110.66

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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.