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Finding the Fourth Proportional to 104.48, 144.54 and 91.58

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Solution

The fourth proportional to 104.48, 144.54 and 91.58 is: 126.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.48 : 144.54 = 91.58 : x
  2. Step 2: Convert to fraction form
    104.48/144.54 = 91.58/x
  3. Step 3: Cross multiply
    104.48x = 144.54 × 91.58
  4. Step 4: Simplify right side
    104.48x = 13,236.25
  5. Step 5: Solve for x
    x = 13,236.25/104.48
  6. Step 6: Final answer
    x = 126.69

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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.