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Finding the Fourth Proportional to 207,388.60, 311,121.30 and 67,151.80

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Solution

The fourth proportional to 207,388.60, 311,121.30 and 67,151.80 is: 100,740.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,388.60 : 311,121.30 = 67,151.80 : x
  2. Step 2: Convert to fraction form
    207,388.60/311,121.30 = 67,151.80/x
  3. Step 3: Cross multiply
    207,388.60x = 311,121.30 × 67,151.80
  4. Step 4: Simplify right side
    207,388.60x = 20,892,355,313.34
  5. Step 5: Solve for x
    x = 20,892,355,313.34/207,388.60
  6. Step 6: Final answer
    x = 100,740.13

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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.