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Finding the Fourth Proportional to 69,418.80, 104,176.80 and 30,004.20

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Solution

The fourth proportional to 69,418.80, 104,176.80 and 30,004.20 is: 45,027.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,418.80 : 104,176.80 = 30,004.20 : x
  2. Step 2: Convert to fraction form
    69,418.80/104,176.80 = 30,004.20/x
  3. Step 3: Cross multiply
    69,418.80x = 104,176.80 × 30,004.20
  4. Step 4: Simplify right side
    69,418.80x = 3,125,741,542.56
  5. Step 5: Solve for x
    x = 3,125,741,542.56/69,418.80
  6. Step 6: Final answer
    x = 45,027.31

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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.