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Finding the Fourth Proportional to 207,603.40, 311,481.90 and 67,366.60

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Solution

The fourth proportional to 207,603.40, 311,481.90 and 67,366.60 is: 101,074.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,603.40 : 311,481.90 = 67,366.60 : x
  2. Step 2: Convert to fraction form
    207,603.40/311,481.90 = 67,366.60/x
  3. Step 3: Cross multiply
    207,603.40x = 311,481.90 × 67,366.60
  4. Step 4: Simplify right side
    207,603.40x = 20,983,476,564.54
  5. Step 5: Solve for x
    x = 20,983,476,564.54/207,603.40
  6. Step 6: Final answer
    x = 101,074.82

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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.