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Finding the Fourth Proportional to 80,485.44, 120,687.60 and 27,880.80

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Solution

The fourth proportional to 80,485.44, 120,687.60 and 27,880.80 is: 41,807.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.44 : 120,687.60 = 27,880.80 : x
  2. Step 2: Convert to fraction form
    80,485.44/120,687.60 = 27,880.80/x
  3. Step 3: Cross multiply
    80,485.44x = 120,687.60 × 27,880.80
  4. Step 4: Simplify right side
    80,485.44x = 3,364,866,838.08
  5. Step 5: Solve for x
    x = 3,364,866,838.08/80,485.44
  6. Step 6: Final answer
    x = 41,807.15

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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.