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Finding the Fourth Proportional to 68,789.75, 103,213.87 and 37,588.55

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Solution

The fourth proportional to 68,789.75, 103,213.87 and 37,588.55 is: 56,398.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,789.75 : 103,213.87 = 37,588.55 : x
  2. Step 2: Convert to fraction form
    68,789.75/103,213.87 = 37,588.55/x
  3. Step 3: Cross multiply
    68,789.75x = 103,213.87 × 37,588.55
  4. Step 4: Simplify right side
    68,789.75x = 3,879,659,103.15
  5. Step 5: Solve for x
    x = 3,879,659,103.15/68,789.75
  6. Step 6: Final answer
    x = 56,398.80

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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.