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Finding the Fourth Proportional to 205,884.20, 308,826.30 and 72,768.80

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Solution

The fourth proportional to 205,884.20, 308,826.30 and 72,768.80 is: 109,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,884.20 : 308,826.30 = 72,768.80 : x
  2. Step 2: Convert to fraction form
    205,884.20/308,826.30 = 72,768.80/x
  3. Step 3: Cross multiply
    205,884.20x = 308,826.30 × 72,768.80
  4. Step 4: Simplify right side
    205,884.20x = 22,472,919,259.44
  5. Step 5: Solve for x
    x = 22,472,919,259.44/205,884.20
  6. Step 6: Final answer
    x = 109,153.20

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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.