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Finding the Fourth Proportional to 68,609.80, 102,914.70 and 21,867.40

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Solution

The fourth proportional to 68,609.80, 102,914.70 and 21,867.40 is: 32,801.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,609.80 : 102,914.70 = 21,867.40 : x
  2. Step 2: Convert to fraction form
    68,609.80/102,914.70 = 21,867.40/x
  3. Step 3: Cross multiply
    68,609.80x = 102,914.70 × 21,867.40
  4. Step 4: Simplify right side
    68,609.80x = 2,250,476,910.78
  5. Step 5: Solve for x
    x = 2,250,476,910.78/68,609.80
  6. Step 6: Final answer
    x = 32,801.10

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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.