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Finding the Fourth Proportional to 207,388.95, 311,132.63 and 67,147.57

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Solution

The fourth proportional to 207,388.95, 311,132.63 and 67,147.57 is: 100,737.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,388.95 : 311,132.63 = 67,147.57 : x
  2. Step 2: Convert to fraction form
    207,388.95/311,132.63 = 67,147.57/x
  3. Step 3: Cross multiply
    207,388.95x = 311,132.63 × 67,147.57
  4. Step 4: Simplify right side
    207,388.95x = 20,891,799,716.47
  5. Step 5: Solve for x
    x = 20,891,799,716.47/207,388.95
  6. Step 6: Final answer
    x = 100,737.29

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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.