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Finding the Fourth Proportional to 80,115.42, 120,295.44 and 67,796.94

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Solution

The fourth proportional to 80,115.42, 120,295.44 and 67,796.94 is: 101,798.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,115.42 : 120,295.44 = 67,796.94 : x
  2. Step 2: Convert to fraction form
    80,115.42/120,295.44 = 67,796.94/x
  3. Step 3: Cross multiply
    80,115.42x = 120,295.44 × 67,796.94
  4. Step 4: Simplify right side
    80,115.42x = 8,155,662,727.95
  5. Step 5: Solve for x
    x = 8,155,662,727.95/80,115.42
  6. Step 6: Final answer
    x = 101,798.91

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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.