Home / 207,961.92-311,942.40-67,720.32

Finding the Fourth Proportional to 207,961.92, 311,942.40 and 67,720.32

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Solution

The fourth proportional to 207,961.92, 311,942.40 and 67,720.32 is: 101,580.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,961.92 : 311,942.40 = 67,720.32 : x
  2. Step 2: Convert to fraction form
    207,961.92/311,942.40 = 67,720.32/x
  3. Step 3: Cross multiply
    207,961.92x = 311,942.40 × 67,720.32
  4. Step 4: Simplify right side
    207,961.92x = 21,124,839,149.57
  5. Step 5: Solve for x
    x = 21,124,839,149.57/207,961.92
  6. Step 6: Final answer
    x = 101,580.32

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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.