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Finding the Fourth Proportional to 69,954.62, 104,916.97 and 20,021.31

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Solution

The fourth proportional to 69,954.62, 104,916.97 and 20,021.31 is: 30,027.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,954.62 : 104,916.97 = 20,021.31 : x
  2. Step 2: Convert to fraction form
    69,954.62/104,916.97 = 20,021.31/x
  3. Step 3: Cross multiply
    69,954.62x = 104,916.97 × 20,021.31
  4. Step 4: Simplify right side
    69,954.62x = 2,100,575,205.66
  5. Step 5: Solve for x
    x = 2,100,575,205.66/69,954.62
  6. Step 6: Final answer
    x = 30,027.68

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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.