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Finding the Fourth Proportional to 80,470.44, 120,665.16 and 27,865.80

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Solution

The fourth proportional to 80,470.44, 120,665.16 and 27,865.80 is: 41,784.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,470.44 : 120,665.16 = 27,865.80 : x
  2. Step 2: Convert to fraction form
    80,470.44/120,665.16 = 27,865.80/x
  3. Step 3: Cross multiply
    80,470.44x = 120,665.16 × 27,865.80
  4. Step 4: Simplify right side
    80,470.44x = 3,362,431,215.53
  5. Step 5: Solve for x
    x = 3,362,431,215.53/80,470.44
  6. Step 6: Final answer
    x = 41,784.68

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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.