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Finding the Fourth Proportional to 80,305.44, 120,360.96 and 70,857.60

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Solution

The fourth proportional to 80,305.44, 120,360.96 and 70,857.60 is: 106,200.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,305.44 : 120,360.96 = 70,857.60 : x
  2. Step 2: Convert to fraction form
    80,305.44/120,360.96 = 70,857.60/x
  3. Step 3: Cross multiply
    80,305.44x = 120,360.96 × 70,857.60
  4. Step 4: Simplify right side
    80,305.44x = 8,528,488,759.30
  5. Step 5: Solve for x
    x = 8,528,488,759.30/80,305.44
  6. Step 6: Final answer
    x = 106,200.64

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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.