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Finding the Fourth Proportional to 71,799.21, 107,691.21 and 19,214.01

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Solution

The fourth proportional to 71,799.21, 107,691.21 and 19,214.01 is: 28,818.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799.21 : 107,691.21 = 19,214.01 : x
  2. Step 2: Convert to fraction form
    71,799.21/107,691.21 = 19,214.01/x
  3. Step 3: Cross multiply
    71,799.21x = 107,691.21 × 19,214.01
  4. Step 4: Simplify right side
    71,799.21x = 2,069,179,985.85
  5. Step 5: Solve for x
    x = 2,069,179,985.85/71,799.21
  6. Step 6: Final answer
    x = 28,818.98

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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.