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Finding the Fourth Proportional to 68,793.30, 103,172.40 and 21,399.12

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Solution

The fourth proportional to 68,793.30, 103,172.40 and 21,399.12 is: 32,093.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,793.30 : 103,172.40 = 21,399.12 : x
  2. Step 2: Convert to fraction form
    68,793.30/103,172.40 = 21,399.12/x
  3. Step 3: Cross multiply
    68,793.30x = 103,172.40 × 21,399.12
  4. Step 4: Simplify right side
    68,793.30x = 2,207,798,568.29
  5. Step 5: Solve for x
    x = 2,207,798,568.29/68,793.30
  6. Step 6: Final answer
    x = 32,093.22

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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.