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Finding the Fourth Proportional to 262,300,979.80, 393,451,469.70 and 80,524,538.20

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Solution

The fourth proportional to 262,300,979.80, 393,451,469.70 and 80,524,538.20 is: 120,786,807.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,300,979.80 : 393,451,469.70 = 80,524,538.20 : x
  2. Step 2: Convert to fraction form
    262,300,979.80/393,451,469.70 = 80,524,538.20/x
  3. Step 3: Cross multiply
    262,300,979.80x = 393,451,469.70 × 80,524,538.20
  4. Step 4: Simplify right side
    262,300,979.80x = 31,682,497,901,703,792
  5. Step 5: Solve for x
    x = 31,682,497,901,703,792/262,300,979.80
  6. Step 6: Final answer
    x = 120,786,807.30

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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.