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Finding the Fourth Proportional to 66,620.75, 91,939.10 and 36,408.10

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Solution

The fourth proportional to 66,620.75, 91,939.10 and 36,408.10 is: 50,244.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,620.75 : 91,939.10 = 36,408.10 : x
  2. Step 2: Convert to fraction form
    66,620.75/91,939.10 = 36,408.10/x
  3. Step 3: Cross multiply
    66,620.75x = 91,939.10 × 36,408.10
  4. Step 4: Simplify right side
    66,620.75x = 3,347,327,912.00
  5. Step 5: Solve for x
    x = 3,347,327,912.00/66,620.75
  6. Step 6: Final answer
    x = 50,244.53

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1.5x scale

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.