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Finding the Fourth Proportional to 71,913.80, 99,240.72 and 41,716.64

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Solution

The fourth proportional to 71,913.80, 99,240.72 and 41,716.64 is: 57,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,913.80 : 99,240.72 = 41,716.64 : x
  2. Step 2: Convert to fraction form
    71,913.80/99,240.72 = 41,716.64/x
  3. Step 3: Cross multiply
    71,913.80x = 99,240.72 × 41,716.64
  4. Step 4: Simplify right side
    71,913.80x = 4,139,989,389.58
  5. Step 5: Solve for x
    x = 4,139,989,389.58/71,913.80
  6. Step 6: Final answer
    x = 57,568.78

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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.