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Finding the Fourth Proportional to 68,490.60, 102,755.10 and 33,431.40

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Solution

The fourth proportional to 68,490.60, 102,755.10 and 33,431.40 is: 50,156.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,490.60 : 102,755.10 = 33,431.40 : x
  2. Step 2: Convert to fraction form
    68,490.60/102,755.10 = 33,431.40/x
  3. Step 3: Cross multiply
    68,490.60x = 102,755.10 × 33,431.40
  4. Step 4: Simplify right side
    68,490.60x = 3,435,246,850.14
  5. Step 5: Solve for x
    x = 3,435,246,850.14/68,490.60
  6. Step 6: Final answer
    x = 50,156.47

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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.