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Finding the Fourth Proportional to 71,873.88, 107,814.87 and 21,961.68

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Solution

The fourth proportional to 71,873.88, 107,814.87 and 21,961.68 is: 32,943.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,873.88 : 107,814.87 = 21,961.68 : x
  2. Step 2: Convert to fraction form
    71,873.88/107,814.87 = 21,961.68/x
  3. Step 3: Cross multiply
    71,873.88x = 107,814.87 × 21,961.68
  4. Step 4: Simplify right side
    71,873.88x = 2,367,795,674.18
  5. Step 5: Solve for x
    x = 2,367,795,674.18/71,873.88
  6. Step 6: Final answer
    x = 32,943.76

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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.