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Finding the Fourth Proportional to 66,605.16, 91,914.05 and 36,389.83

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Solution

The fourth proportional to 66,605.16, 91,914.05 and 36,389.83 is: 50,217.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.16 : 91,914.05 = 36,389.83 : x
  2. Step 2: Convert to fraction form
    66,605.16/91,914.05 = 36,389.83/x
  3. Step 3: Cross multiply
    66,605.16x = 91,914.05 × 36,389.83
  4. Step 4: Simplify right side
    66,605.16x = 3,344,736,654.11
  5. Step 5: Solve for x
    x = 3,344,736,654.11/66,605.16
  6. Step 6: Final answer
    x = 50,217.38

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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.