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Finding the Fourth Proportional to 79,323.03, 109,469.21 and 47,485.78

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Solution

The fourth proportional to 79,323.03, 109,469.21 and 47,485.78 is: 65,532.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,323.03 : 109,469.21 = 47,485.78 : x
  2. Step 2: Convert to fraction form
    79,323.03/109,469.21 = 47,485.78/x
  3. Step 3: Cross multiply
    79,323.03x = 109,469.21 × 47,485.78
  4. Step 4: Simplify right side
    79,323.03x = 5,198,230,311.73
  5. Step 5: Solve for x
    x = 5,198,230,311.73/79,323.03
  6. Step 6: Final answer
    x = 65,532.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.