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Finding the Fourth Proportional to 71,790.64, 99,076.80 and 41,576.49

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Solution

The fourth proportional to 71,790.64, 99,076.80 and 41,576.49 is: 57,378.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,790.64 : 99,076.80 = 41,576.49 : x
  2. Step 2: Convert to fraction form
    71,790.64/99,076.80 = 41,576.49/x
  3. Step 3: Cross multiply
    71,790.64x = 99,076.80 × 41,576.49
  4. Step 4: Simplify right side
    71,790.64x = 4,119,265,740.34
  5. Step 5: Solve for x
    x = 4,119,265,740.34/71,790.64
  6. Step 6: Final answer
    x = 57,378.87

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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.