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Finding the Fourth Proportional to 135.65, 187.13 and 80.37

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Solution

The fourth proportional to 135.65, 187.13 and 80.37 is: 110.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.65 : 187.13 = 80.37 : x
  2. Step 2: Convert to fraction form
    135.65/187.13 = 80.37/x
  3. Step 3: Cross multiply
    135.65x = 187.13 × 80.37
  4. Step 4: Simplify right side
    135.65x = 15,039.84
  5. Step 5: Solve for x
    x = 15,039.84/135.65
  6. Step 6: Final answer
    x = 110.87

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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.