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Finding the Fourth Proportional to 80,661.60, 120,846.60 and 68,997.60

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Solution

The fourth proportional to 80,661.60, 120,846.60 and 68,997.60 is: 103,371.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,661.60 : 120,846.60 = 68,997.60 : x
  2. Step 2: Convert to fraction form
    80,661.60/120,846.60 = 68,997.60/x
  3. Step 3: Cross multiply
    80,661.60x = 120,846.60 × 68,997.60
  4. Step 4: Simplify right side
    80,661.60x = 8,338,125,368.16
  5. Step 5: Solve for x
    x = 8,338,125,368.16/80,661.60
  6. Step 6: Final answer
    x = 103,371.68

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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.