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Finding the Fourth Proportional to 45,793.80, 68,658.30 and 20,845.80

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Solution

The fourth proportional to 45,793.80, 68,658.30 and 20,845.80 is: 31,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,793.80 : 68,658.30 = 20,845.80 : x
  2. Step 2: Convert to fraction form
    45,793.80/68,658.30 = 20,845.80/x
  3. Step 3: Cross multiply
    45,793.80x = 68,658.30 × 20,845.80
  4. Step 4: Simplify right side
    45,793.80x = 1,431,237,190.14
  5. Step 5: Solve for x
    x = 1,431,237,190.14/45,793.80
  6. Step 6: Final answer
    x = 31,253.95

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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.