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Finding the Fourth Proportional to 67,269.80, 100,901.04 and 20,519

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Solution

The fourth proportional to 67,269.80, 100,901.04 and 20,519 is: 30,777.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,269.80 : 100,901.04 = 20,519 : x
  2. Step 2: Convert to fraction form
    67,269.80/100,901.04 = 20,519/x
  3. Step 3: Cross multiply
    67,269.80x = 100,901.04 × 20,519
  4. Step 4: Simplify right side
    67,269.80x = 2,070,388,439.76
  5. Step 5: Solve for x
    x = 2,070,388,439.76/67,269.80
  6. Step 6: Final answer
    x = 30,777.38

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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.