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Finding the Fourth Proportional to 135.20, 186.12 and 116.74

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Solution

The fourth proportional to 135.20, 186.12 and 116.74 is: 160.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.20 : 186.12 = 116.74 : x
  2. Step 2: Convert to fraction form
    135.20/186.12 = 116.74/x
  3. Step 3: Cross multiply
    135.20x = 186.12 × 116.74
  4. Step 4: Simplify right side
    135.20x = 21,727.65
  5. Step 5: Solve for x
    x = 21,727.65/135.20
  6. Step 6: Final answer
    x = 160.71

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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.