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Finding the Fourth Proportional to 68,835.20, 103,240.50 and 18,234.60

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Solution

The fourth proportional to 68,835.20, 103,240.50 and 18,234.60 is: 27,348.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,835.20 : 103,240.50 = 18,234.60 : x
  2. Step 2: Convert to fraction form
    68,835.20/103,240.50 = 18,234.60/x
  3. Step 3: Cross multiply
    68,835.20x = 103,240.50 × 18,234.60
  4. Step 4: Simplify right side
    68,835.20x = 1,882,549,221.30
  5. Step 5: Solve for x
    x = 1,882,549,221.30/68,835.20
  6. Step 6: Final answer
    x = 27,348.64

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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.