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Finding the Fourth Proportional to 66,638.91, 91,961.78 and 38,350.11

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Solution

The fourth proportional to 66,638.91, 91,961.78 and 38,350.11 is: 52,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.91 : 91,961.78 = 38,350.11 : x
  2. Step 2: Convert to fraction form
    66,638.91/91,961.78 = 38,350.11/x
  3. Step 3: Cross multiply
    66,638.91x = 91,961.78 × 38,350.11
  4. Step 4: Simplify right side
    66,638.91x = 3,526,744,187.05
  5. Step 5: Solve for x
    x = 3,526,744,187.05/66,638.91
  6. Step 6: Final answer
    x = 52,923.20

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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.