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Finding the Fourth Proportional to 71,793.31, 107,706.02 and 21,877.31

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Solution

The fourth proportional to 71,793.31, 107,706.02 and 21,877.31 is: 32,820.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,793.31 : 107,706.02 = 21,877.31 : x
  2. Step 2: Convert to fraction form
    71,793.31/107,706.02 = 21,877.31/x
  3. Step 3: Cross multiply
    71,793.31x = 107,706.02 × 21,877.31
  4. Step 4: Simplify right side
    71,793.31x = 2,356,317,340.49
  5. Step 5: Solve for x
    x = 2,356,317,340.49/71,793.31
  6. Step 6: Final answer
    x = 32,820.85

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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.