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Finding the Fourth Proportional to 180,705.40, 270,863.70 and 68,342.20

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Solution

The fourth proportional to 180,705.40, 270,863.70 and 68,342.20 is: 102,439.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,705.40 : 270,863.70 = 68,342.20 : x
  2. Step 2: Convert to fraction form
    180,705.40/270,863.70 = 68,342.20/x
  3. Step 3: Cross multiply
    180,705.40x = 270,863.70 × 68,342.20
  4. Step 4: Simplify right side
    180,705.40x = 18,511,421,158.14
  5. Step 5: Solve for x
    x = 18,511,421,158.14/180,705.40
  6. Step 6: Final answer
    x = 102,439.78

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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.