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Finding the Fourth Proportional to 207,378.82, 311,117.62 and 67,137.44

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Solution

The fourth proportional to 207,378.82, 311,117.62 and 67,137.44 is: 100,722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,378.82 : 311,117.62 = 67,137.44 : x
  2. Step 2: Convert to fraction form
    207,378.82/311,117.62 = 67,137.44/x
  3. Step 3: Cross multiply
    207,378.82x = 311,117.62 × 67,137.44
  4. Step 4: Simplify right side
    207,378.82x = 20,887,640,545.69
  5. Step 5: Solve for x
    x = 20,887,640,545.69/207,378.82
  6. Step 6: Final answer
    x = 100,722.15

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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.