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Finding the Fourth Proportional to 68,154.72, 102,241.68 and 28,687.20

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Solution

The fourth proportional to 68,154.72, 102,241.68 and 28,687.20 is: 43,034.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,154.72 : 102,241.68 = 28,687.20 : x
  2. Step 2: Convert to fraction form
    68,154.72/102,241.68 = 28,687.20/x
  3. Step 3: Cross multiply
    68,154.72x = 102,241.68 × 28,687.20
  4. Step 4: Simplify right side
    68,154.72x = 2,933,027,522.50
  5. Step 5: Solve for x
    x = 2,933,027,522.50/68,154.72
  6. Step 6: Final answer
    x = 43,034.84

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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.