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Finding the Fourth Proportional to 207,861.60, 311,331.60 and 83,138.40

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Solution

The fourth proportional to 207,861.60, 311,331.60 and 83,138.40 is: 124,523.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,861.60 : 311,331.60 = 83,138.40 : x
  2. Step 2: Convert to fraction form
    207,861.60/311,331.60 = 83,138.40/x
  3. Step 3: Cross multiply
    207,861.60x = 311,331.60 × 83,138.40
  4. Step 4: Simplify right side
    207,861.60x = 25,883,611,093.44
  5. Step 5: Solve for x
    x = 25,883,611,093.44/207,861.60
  6. Step 6: Final answer
    x = 124,523.29

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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.