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Finding the Fourth Proportional to 110.21, 152.32 and 91.75

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Solution

The fourth proportional to 110.21, 152.32 and 91.75 is: 126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.21 : 152.32 = 91.75 : x
  2. Step 2: Convert to fraction form
    110.21/152.32 = 91.75/x
  3. Step 3: Cross multiply
    110.21x = 152.32 × 91.75
  4. Step 4: Simplify right side
    110.21x = 13,974.14
  5. Step 5: Solve for x
    x = 13,974.14/110.21
  6. Step 6: Final answer
    x = 126.80

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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.