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Finding the Fourth Proportional to 28,942,149.60, 43,462,990.80 and 20,481,861.60

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Solution

The fourth proportional to 28,942,149.60, 43,462,990.80 and 20,481,861.60 is: 30,758,011.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,942,149.60 : 43,462,990.80 = 20,481,861.60 : x
  2. Step 2: Convert to fraction form
    28,942,149.60/43,462,990.80 = 20,481,861.60/x
  3. Step 3: Cross multiply
    28,942,149.60x = 43,462,990.80 × 20,481,861.60
  4. Step 4: Simplify right side
    28,942,149.60x = 890,202,962,287,673.25
  5. Step 5: Solve for x
    x = 890,202,962,287,673.25/28,942,149.60
  6. Step 6: Final answer
    x = 30,758,011.23

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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.