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Finding the Fourth Proportional to 110.75, 165.99 and 45.78

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Solution

The fourth proportional to 110.75, 165.99 and 45.78 is: 68.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.75 : 165.99 = 45.78 : x
  2. Step 2: Convert to fraction form
    110.75/165.99 = 45.78/x
  3. Step 3: Cross multiply
    110.75x = 165.99 × 45.78
  4. Step 4: Simplify right side
    110.75x = 7,599.02
  5. Step 5: Solve for x
    x = 7,599.02/110.75
  6. Step 6: Final answer
    x = 68.61

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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.