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Finding the Fourth Proportional to 69,747.20, 104,620.80 and 36,979.20

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Solution

The fourth proportional to 69,747.20, 104,620.80 and 36,979.20 is: 55,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,747.20 : 104,620.80 = 36,979.20 : x
  2. Step 2: Convert to fraction form
    69,747.20/104,620.80 = 36,979.20/x
  3. Step 3: Cross multiply
    69,747.20x = 104,620.80 × 36,979.20
  4. Step 4: Simplify right side
    69,747.20x = 3,868,793,487.36
  5. Step 5: Solve for x
    x = 3,868,793,487.36/69,747.20
  6. Step 6: Final answer
    x = 55,468.80

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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.