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Finding the Fourth Proportional to 68,639.20, 102,829.20 and 35,245.60

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Solution

The fourth proportional to 68,639.20, 102,829.20 and 35,245.60 is: 52,801.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,639.20 : 102,829.20 = 35,245.60 : x
  2. Step 2: Convert to fraction form
    68,639.20/102,829.20 = 35,245.60/x
  3. Step 3: Cross multiply
    68,639.20x = 102,829.20 × 35,245.60
  4. Step 4: Simplify right side
    68,639.20x = 3,624,276,851.52
  5. Step 5: Solve for x
    x = 3,624,276,851.52/68,639.20
  6. Step 6: Final answer
    x = 52,801.85

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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.