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Finding the Fourth Proportional to 207,375.60, 311,101.80 and 67,138.80

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Solution

The fourth proportional to 207,375.60, 311,101.80 and 67,138.80 is: 100,720.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,375.60 : 311,101.80 = 67,138.80 : x
  2. Step 2: Convert to fraction form
    207,375.60/311,101.80 = 67,138.80/x
  3. Step 3: Cross multiply
    207,375.60x = 311,101.80 × 67,138.80
  4. Step 4: Simplify right side
    207,375.60x = 20,887,001,529.84
  5. Step 5: Solve for x
    x = 20,887,001,529.84/207,375.60
  6. Step 6: Final answer
    x = 100,720.63

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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.