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Finding the Fourth Proportional to 69,943.50, 104,912.42 and 20,021.58

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Solution

The fourth proportional to 69,943.50, 104,912.42 and 20,021.58 is: 30,031.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,943.50 : 104,912.42 = 20,021.58 : x
  2. Step 2: Convert to fraction form
    69,943.50/104,912.42 = 20,021.58/x
  3. Step 3: Cross multiply
    69,943.50x = 104,912.42 × 20,021.58
  4. Step 4: Simplify right side
    69,943.50x = 2,100,512,309.92
  5. Step 5: Solve for x
    x = 2,100,512,309.92/69,943.50
  6. Step 6: Final answer
    x = 30,031.56

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1.5x scale

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.