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Finding the Fourth Proportional to 110.44, 165.43 and 86.04

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Solution

The fourth proportional to 110.44, 165.43 and 86.04 is: 128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.44 : 165.43 = 86.04 : x
  2. Step 2: Convert to fraction form
    110.44/165.43 = 86.04/x
  3. Step 3: Cross multiply
    110.44x = 165.43 × 86.04
  4. Step 4: Simplify right side
    110.44x = 14,233.60
  5. Step 5: Solve for x
    x = 14,233.60/110.44
  6. Step 6: Final answer
    x = 128.88

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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.