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Finding the Fourth Proportional to 68,858.30, 103,288.37 and 39,240.86

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Solution

The fourth proportional to 68,858.30, 103,288.37 and 39,240.86 is: 58,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,858.30 : 103,288.37 = 39,240.86 : x
  2. Step 2: Convert to fraction form
    68,858.30/103,288.37 = 39,240.86/x
  3. Step 3: Cross multiply
    68,858.30x = 103,288.37 × 39,240.86
  4. Step 4: Simplify right side
    68,858.30x = 4,053,123,754.15
  5. Step 5: Solve for x
    x = 4,053,123,754.15/68,858.30
  6. Step 6: Final answer
    x = 58,861.80

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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.