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Finding the Fourth Proportional to 66,236.82, 91,405.94 and 36,021.49

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Solution

The fourth proportional to 66,236.82, 91,405.94 and 36,021.49 is: 49,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,236.82 : 91,405.94 = 36,021.49 : x
  2. Step 2: Convert to fraction form
    66,236.82/91,405.94 = 36,021.49/x
  3. Step 3: Cross multiply
    66,236.82x = 91,405.94 × 36,021.49
  4. Step 4: Simplify right side
    66,236.82x = 3,292,578,153.65
  5. Step 5: Solve for x
    x = 3,292,578,153.65/66,236.82
  6. Step 6: Final answer
    x = 49,709.18

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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.