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Finding the Fourth Proportional to 91.75, 125.53 and 91.37

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Solution

The fourth proportional to 91.75, 125.53 and 91.37 is: 125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.75 : 125.53 = 91.37 : x
  2. Step 2: Convert to fraction form
    91.75/125.53 = 91.37/x
  3. Step 3: Cross multiply
    91.75x = 125.53 × 91.37
  4. Step 4: Simplify right side
    91.75x = 11,469.68
  5. Step 5: Solve for x
    x = 11,469.68/91.75
  6. Step 6: Final answer
    x = 125.01

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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.