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Finding the Fourth Proportional to 68,435.20, 102,729.60 and 52,921.60

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Solution

The fourth proportional to 68,435.20, 102,729.60 and 52,921.60 is: 79,441.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,435.20 : 102,729.60 = 52,921.60 : x
  2. Step 2: Convert to fraction form
    68,435.20/102,729.60 = 52,921.60/x
  3. Step 3: Cross multiply
    68,435.20x = 102,729.60 × 52,921.60
  4. Step 4: Simplify right side
    68,435.20x = 5,436,614,799.36
  5. Step 5: Solve for x
    x = 5,436,614,799.36/68,435.20
  6. Step 6: Final answer
    x = 79,441.79

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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.