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Finding the Fourth Proportional to 68,019.20, 102,105.60 and 52,505.60

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Solution

The fourth proportional to 68,019.20, 102,105.60 and 52,505.60 is: 78,817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,019.20 : 102,105.60 = 52,505.60 : x
  2. Step 2: Convert to fraction form
    68,019.20/102,105.60 = 52,505.60/x
  3. Step 3: Cross multiply
    68,019.20x = 102,105.60 × 52,505.60
  4. Step 4: Simplify right side
    68,019.20x = 5,361,115,791.36
  5. Step 5: Solve for x
    x = 5,361,115,791.36/68,019.20
  6. Step 6: Final answer
    x = 78,817.68

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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.