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Finding the Fourth Proportional to 68,803.20, 103,204.80 and 33,811.20

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Solution

The fourth proportional to 68,803.20, 103,204.80 and 33,811.20 is: 50,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,803.20 : 103,204.80 = 33,811.20 : x
  2. Step 2: Convert to fraction form
    68,803.20/103,204.80 = 33,811.20/x
  3. Step 3: Cross multiply
    68,803.20x = 103,204.80 × 33,811.20
  4. Step 4: Simplify right side
    68,803.20x = 3,489,478,133.76
  5. Step 5: Solve for x
    x = 3,489,478,133.76/68,803.20
  6. Step 6: Final answer
    x = 50,716.80

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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.