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Finding the Fourth Proportional to 68,639.20, 102,958.80 and 29,197.60

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Solution

The fourth proportional to 68,639.20, 102,958.80 and 29,197.60 is: 43,796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,639.20 : 102,958.80 = 29,197.60 : x
  2. Step 2: Convert to fraction form
    68,639.20/102,958.80 = 29,197.60/x
  3. Step 3: Cross multiply
    68,639.20x = 102,958.80 × 29,197.60
  4. Step 4: Simplify right side
    68,639.20x = 3,006,149,858.88
  5. Step 5: Solve for x
    x = 3,006,149,858.88/68,639.20
  6. Step 6: Final answer
    x = 43,796.40

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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.