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Finding the Fourth Proportional to 69,529, 104,296.74 and 20,281

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Solution

The fourth proportional to 69,529, 104,296.74 and 20,281 is: 30,422.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,529 : 104,296.74 = 20,281 : x
  2. Step 2: Convert to fraction form
    69,529/104,296.74 = 20,281/x
  3. Step 3: Cross multiply
    69,529x = 104,296.74 × 20,281
  4. Step 4: Simplify right side
    69,529x = 2,115,242,183.94
  5. Step 5: Solve for x
    x = 2,115,242,183.94/69,529
  6. Step 6: Final answer
    x = 30,422.45

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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.