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Finding the Fourth Proportional to 71,760.87, 107,645.73 and 21,844.69

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Solution

The fourth proportional to 71,760.87, 107,645.73 and 21,844.69 is: 32,768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,760.87 : 107,645.73 = 21,844.69 : x
  2. Step 2: Convert to fraction form
    71,760.87/107,645.73 = 21,844.69/x
  3. Step 3: Cross multiply
    71,760.87x = 107,645.73 × 21,844.69
  4. Step 4: Simplify right side
    71,760.87x = 2,351,487,250.64
  5. Step 5: Solve for x
    x = 2,351,487,250.64/71,760.87
  6. Step 6: Final answer
    x = 32,768.38

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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.