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Finding the Fourth Proportional to 66,606.69, 91,917.81 and 36,391.53

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Solution

The fourth proportional to 66,606.69, 91,917.81 and 36,391.53 is: 50,220.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.69 : 91,917.81 = 36,391.53 : x
  2. Step 2: Convert to fraction form
    66,606.69/91,917.81 = 36,391.53/x
  3. Step 3: Cross multiply
    66,606.69x = 91,917.81 × 36,391.53
  4. Step 4: Simplify right side
    66,606.69x = 3,345,029,740.15
  5. Step 5: Solve for x
    x = 3,345,029,740.15/66,606.69
  6. Step 6: Final answer
    x = 50,220.63

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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.