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Finding the Fourth Proportional to 54.14, 81.28 and 50.09

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Solution

The fourth proportional to 54.14, 81.28 and 50.09 is: 75.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.14 : 81.28 = 50.09 : x
  2. Step 2: Convert to fraction form
    54.14/81.28 = 50.09/x
  3. Step 3: Cross multiply
    54.14x = 81.28 × 50.09
  4. Step 4: Simplify right side
    54.14x = 4,071.32
  5. Step 5: Solve for x
    x = 4,071.32/54.14
  6. Step 6: Final answer
    x = 75.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.