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Finding the Fourth Proportional to 100.44, 137.97 and 91.26

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Solution

The fourth proportional to 100.44, 137.97 and 91.26 is: 125.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.44 : 137.97 = 91.26 : x
  2. Step 2: Convert to fraction form
    100.44/137.97 = 91.26/x
  3. Step 3: Cross multiply
    100.44x = 137.97 × 91.26
  4. Step 4: Simplify right side
    100.44x = 12,591.14
  5. Step 5: Solve for x
    x = 12,591.14/100.44
  6. Step 6: Final answer
    x = 125.36

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.