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Finding the Fourth Proportional to 68,879.30, 103,220.30 and 39,235.94

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Solution

The fourth proportional to 68,879.30, 103,220.30 and 39,235.94 is: 58,797.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,879.30 : 103,220.30 = 39,235.94 : x
  2. Step 2: Convert to fraction form
    68,879.30/103,220.30 = 39,235.94/x
  3. Step 3: Cross multiply
    68,879.30x = 103,220.30 × 39,235.94
  4. Step 4: Simplify right side
    68,879.30x = 4,049,945,079.57
  5. Step 5: Solve for x
    x = 4,049,945,079.57/68,879.30
  6. Step 6: Final answer
    x = 58,797.71

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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.