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Finding the Fourth Proportional to 57,994,462.80, 86,991,694.20 and 20,171,998.80

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Solution

The fourth proportional to 57,994,462.80, 86,991,694.20 and 20,171,998.80 is: 30,257,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,994,462.80 : 86,991,694.20 = 20,171,998.80 : x
  2. Step 2: Convert to fraction form
    57,994,462.80/86,991,694.20 = 20,171,998.80/x
  3. Step 3: Cross multiply
    57,994,462.80x = 86,991,694.20 × 20,171,998.80
  4. Step 4: Simplify right side
    57,994,462.80x = 1,754,796,351,012,367
  5. Step 5: Solve for x
    x = 1,754,796,351,012,367/57,994,462.80
  6. Step 6: Final answer
    x = 30,257,998.20

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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.