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Finding the Fourth Proportional to 149.44, 206.25 and 91.22

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Solution

The fourth proportional to 149.44, 206.25 and 91.22 is: 125.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.44 : 206.25 = 91.22 : x
  2. Step 2: Convert to fraction form
    149.44/206.25 = 91.22/x
  3. Step 3: Cross multiply
    149.44x = 206.25 × 91.22
  4. Step 4: Simplify right side
    149.44x = 18,813.67
  5. Step 5: Solve for x
    x = 18,813.67/149.44
  6. Step 6: Final answer
    x = 125.89

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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.