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Finding the Fourth Proportional to 104.61, 144.25 and 67.75

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Solution

The fourth proportional to 104.61, 144.25 and 67.75 is: 93.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.61 : 144.25 = 67.75 : x
  2. Step 2: Convert to fraction form
    104.61/144.25 = 67.75/x
  3. Step 3: Cross multiply
    104.61x = 144.25 × 67.75
  4. Step 4: Simplify right side
    104.61x = 9,772.94
  5. Step 5: Solve for x
    x = 9,772.94/104.61
  6. Step 6: Final answer
    x = 93.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.