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Finding the Fourth Proportional to 207,387.95, 311,131.13 and 67,146.57

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Solution

The fourth proportional to 207,387.95, 311,131.13 and 67,146.57 is: 100,735.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,387.95 : 311,131.13 = 67,146.57 : x
  2. Step 2: Convert to fraction form
    207,387.95/311,131.13 = 67,146.57/x
  3. Step 3: Cross multiply
    207,387.95x = 311,131.13 × 67,146.57
  4. Step 4: Simplify right side
    207,387.95x = 20,891,387,863.99
  5. Step 5: Solve for x
    x = 20,891,387,863.99/207,387.95
  6. Step 6: Final answer
    x = 100,735.79

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1.5x scale

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.