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Finding the Fourth Proportional to 69,986,469.60, 104,979,704.40 and 18,873,655.20

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Solution

The fourth proportional to 69,986,469.60, 104,979,704.40 and 18,873,655.20 is: 28,310,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,986,469.60 : 104,979,704.40 = 18,873,655.20 : x
  2. Step 2: Convert to fraction form
    69,986,469.60/104,979,704.40 = 18,873,655.20/x
  3. Step 3: Cross multiply
    69,986,469.60x = 104,979,704.40 × 18,873,655.20
  4. Step 4: Simplify right side
    69,986,469.60x = 1,981,350,743,843,523
  5. Step 5: Solve for x
    x = 1,981,350,743,843,523/69,986,469.60
  6. Step 6: Final answer
    x = 28,310,482.80

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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.