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Finding the Fourth Proportional to 207,960.87, 311,908.77 and 67,718.55

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Solution

The fourth proportional to 207,960.87, 311,908.77 and 67,718.55 is: 101,567.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,960.87 : 311,908.77 = 67,718.55 : x
  2. Step 2: Convert to fraction form
    207,960.87/311,908.77 = 67,718.55/x
  3. Step 3: Cross multiply
    207,960.87x = 311,908.77 × 67,718.55
  4. Step 4: Simplify right side
    207,960.87x = 21,122,009,636.68
  5. Step 5: Solve for x
    x = 21,122,009,636.68/207,960.87
  6. Step 6: Final answer
    x = 101,567.23

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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.