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Finding the Fourth Proportional to 67,019.78, 100,493.22 and 20,266.58

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Solution

The fourth proportional to 67,019.78, 100,493.22 and 20,266.58 is: 30,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,019.78 : 100,493.22 = 20,266.58 : x
  2. Step 2: Convert to fraction form
    67,019.78/100,493.22 = 20,266.58/x
  3. Step 3: Cross multiply
    67,019.78x = 100,493.22 × 20,266.58
  4. Step 4: Simplify right side
    67,019.78x = 2,036,653,882.59
  5. Step 5: Solve for x
    x = 2,036,653,882.59/67,019.78
  6. Step 6: Final answer
    x = 30,388.85

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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.