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Finding the Fourth Proportional to 71,814.39, 107,685.13 and 53,880.99

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Solution

The fourth proportional to 71,814.39, 107,685.13 and 53,880.99 is: 80,794.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,814.39 : 107,685.13 = 53,880.99 : x
  2. Step 2: Convert to fraction form
    71,814.39/107,685.13 = 53,880.99/x
  3. Step 3: Cross multiply
    71,814.39x = 107,685.13 × 53,880.99
  4. Step 4: Simplify right side
    71,814.39x = 5,802,181,412.68
  5. Step 5: Solve for x
    x = 5,802,181,412.68/71,814.39
  6. Step 6: Final answer
    x = 80,794.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.