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Finding the Fourth Proportional to 135.69, 187.23 and 80.41

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Solution

The fourth proportional to 135.69, 187.23 and 80.41 is: 110.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.69 : 187.23 = 80.41 : x
  2. Step 2: Convert to fraction form
    135.69/187.23 = 80.41/x
  3. Step 3: Cross multiply
    135.69x = 187.23 × 80.41
  4. Step 4: Simplify right side
    135.69x = 15,054.76
  5. Step 5: Solve for x
    x = 15,054.76/135.69
  6. Step 6: Final answer
    x = 110.95

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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.