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Finding the Fourth Proportional to 110.22, 165.44 and 69.72

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Solution

The fourth proportional to 110.22, 165.44 and 69.72 is: 104.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.22 : 165.44 = 69.72 : x
  2. Step 2: Convert to fraction form
    110.22/165.44 = 69.72/x
  3. Step 3: Cross multiply
    110.22x = 165.44 × 69.72
  4. Step 4: Simplify right side
    110.22x = 11,534.48
  5. Step 5: Solve for x
    x = 11,534.48/110.22
  6. Step 6: Final answer
    x = 104.65

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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.