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Finding the Fourth Proportional to 73.92, 110.81 and 28.26

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Solution

The fourth proportional to 73.92, 110.81 and 28.26 is: 42.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.92 : 110.81 = 28.26 : x
  2. Step 2: Convert to fraction form
    73.92/110.81 = 28.26/x
  3. Step 3: Cross multiply
    73.92x = 110.81 × 28.26
  4. Step 4: Simplify right side
    73.92x = 3,131.49
  5. Step 5: Solve for x
    x = 3,131.49/73.92
  6. Step 6: Final answer
    x = 42.36

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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.