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Finding the Fourth Proportional to 66,469.75, 91,728.26 and 36,661.75

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Solution

The fourth proportional to 66,469.75, 91,728.26 and 36,661.75 is: 50,593.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,469.75 : 91,728.26 = 36,661.75 : x
  2. Step 2: Convert to fraction form
    66,469.75/91,728.26 = 36,661.75/x
  3. Step 3: Cross multiply
    66,469.75x = 91,728.26 × 36,661.75
  4. Step 4: Simplify right side
    66,469.75x = 3,362,918,536.06
  5. Step 5: Solve for x
    x = 3,362,918,536.06/66,469.75
  6. Step 6: Final answer
    x = 50,593.22

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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.