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Finding the Fourth Proportional to 71,813.52, 107,734.47 and 21,213.41

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Solution

The fourth proportional to 71,813.52, 107,734.47 and 21,213.41 is: 31,824.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,813.52 : 107,734.47 = 21,213.41 : x
  2. Step 2: Convert to fraction form
    71,813.52/107,734.47 = 21,213.41/x
  3. Step 3: Cross multiply
    71,813.52x = 107,734.47 × 21,213.41
  4. Step 4: Simplify right side
    71,813.52x = 2,285,414,944.57
  5. Step 5: Solve for x
    x = 2,285,414,944.57/71,813.52
  6. Step 6: Final answer
    x = 31,824.30

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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.