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Finding the Fourth Proportional to 71,799.45, 107,690.97 and 19,213.02

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Solution

The fourth proportional to 71,799.45, 107,690.97 and 19,213.02 is: 28,817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799.45 : 107,690.97 = 19,213.02 : x
  2. Step 2: Convert to fraction form
    71,799.45/107,690.97 = 19,213.02/x
  3. Step 3: Cross multiply
    71,799.45x = 107,690.97 × 19,213.02
  4. Step 4: Simplify right side
    71,799.45x = 2,069,068,760.43
  5. Step 5: Solve for x
    x = 2,069,068,760.43/71,799.45
  6. Step 6: Final answer
    x = 28,817.33

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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.