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Finding the Fourth Proportional to 68,667.90, 102,841.92 and 66,776.09

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Solution

The fourth proportional to 68,667.90, 102,841.92 and 66,776.09 is: 100,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,667.90 : 102,841.92 = 66,776.09 : x
  2. Step 2: Convert to fraction form
    68,667.90/102,841.92 = 66,776.09/x
  3. Step 3: Cross multiply
    68,667.90x = 102,841.92 × 66,776.09
  4. Step 4: Simplify right side
    68,667.90x = 6,867,380,791.48
  5. Step 5: Solve for x
    x = 6,867,380,791.48/68,667.90
  6. Step 6: Final answer
    x = 100,008.60

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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.