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Finding the Fourth Proportional to 110.21, 165.28 and 38.09

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Solution

The fourth proportional to 110.21, 165.28 and 38.09 is: 57.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.21 : 165.28 = 38.09 : x
  2. Step 2: Convert to fraction form
    110.21/165.28 = 38.09/x
  3. Step 3: Cross multiply
    110.21x = 165.28 × 38.09
  4. Step 4: Simplify right side
    110.21x = 6,294.59
  5. Step 5: Solve for x
    x = 6,294.59/110.21
  6. Step 6: Final answer
    x = 57.12

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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.