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Finding the Fourth Proportional to 91.09, 125.77 and 69.37

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Solution

The fourth proportional to 91.09, 125.77 and 69.37 is: 95.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.09 : 125.77 = 69.37 : x
  2. Step 2: Convert to fraction form
    91.09/125.77 = 69.37/x
  3. Step 3: Cross multiply
    91.09x = 125.77 × 69.37
  4. Step 4: Simplify right side
    91.09x = 8,724.32
  5. Step 5: Solve for x
    x = 8,724.32/91.09
  6. Step 6: Final answer
    x = 95.78

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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.