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Finding the Fourth Proportional to 68,958.80, 103,428.60 and 22,216.40

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Solution

The fourth proportional to 68,958.80, 103,428.60 and 22,216.40 is: 33,321.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,958.80 : 103,428.60 = 22,216.40 : x
  2. Step 2: Convert to fraction form
    68,958.80/103,428.60 = 22,216.40/x
  3. Step 3: Cross multiply
    68,958.80x = 103,428.60 × 22,216.40
  4. Step 4: Simplify right side
    68,958.80x = 2,297,811,149.04
  5. Step 5: Solve for x
    x = 2,297,811,149.04/68,958.80
  6. Step 6: Final answer
    x = 33,321.51

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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.