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Finding the Fourth Proportional to 71,799.84, 107,691.39 and 19,213.47

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Solution

The fourth proportional to 71,799.84, 107,691.39 and 19,213.47 is: 28,817.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799.84 : 107,691.39 = 19,213.47 : x
  2. Step 2: Convert to fraction form
    71,799.84/107,691.39 = 19,213.47/x
  3. Step 3: Cross multiply
    71,799.84x = 107,691.39 × 19,213.47
  4. Step 4: Simplify right side
    71,799.84x = 2,069,125,291.02
  5. Step 5: Solve for x
    x = 2,069,125,291.02/71,799.84
  6. Step 6: Final answer
    x = 28,817.97

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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.