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Finding the Fourth Proportional to 110.39, 165.52 and 76.17

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Solution

The fourth proportional to 110.39, 165.52 and 76.17 is: 114.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.39 : 165.52 = 76.17 : x
  2. Step 2: Convert to fraction form
    110.39/165.52 = 76.17/x
  3. Step 3: Cross multiply
    110.39x = 165.52 × 76.17
  4. Step 4: Simplify right side
    110.39x = 12,607.28
  5. Step 5: Solve for x
    x = 12,607.28/110.39
  6. Step 6: Final answer
    x = 114.21

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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.