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Finding the Fourth Proportional to 68,842.37, 103,244.78 and 18,910.60

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Solution

The fourth proportional to 68,842.37, 103,244.78 and 18,910.60 is: 28,360.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,842.37 : 103,244.78 = 18,910.60 : x
  2. Step 2: Convert to fraction form
    68,842.37/103,244.78 = 18,910.60/x
  3. Step 3: Cross multiply
    68,842.37x = 103,244.78 × 18,910.60
  4. Step 4: Simplify right side
    68,842.37x = 1,952,420,525.83
  5. Step 5: Solve for x
    x = 1,952,420,525.83/68,842.37
  6. Step 6: Final answer
    x = 28,360.74

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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.