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Finding the Fourth Proportional to 54.23, 81.27 and 50.45

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Solution

The fourth proportional to 54.23, 81.27 and 50.45 is: 75.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.23 : 81.27 = 50.45 : x
  2. Step 2: Convert to fraction form
    54.23/81.27 = 50.45/x
  3. Step 3: Cross multiply
    54.23x = 81.27 × 50.45
  4. Step 4: Simplify right side
    54.23x = 4,099.67
  5. Step 5: Solve for x
    x = 4,099.67/54.23
  6. Step 6: Final answer
    x = 75.60

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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.