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Finding the Fourth Proportional to 207,639.60, 311,344.20 and 82,839.60

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Solution

The fourth proportional to 207,639.60, 311,344.20 and 82,839.60 is: 124,213.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,639.60 : 311,344.20 = 82,839.60 : x
  2. Step 2: Convert to fraction form
    207,639.60/311,344.20 = 82,839.60/x
  3. Step 3: Cross multiply
    207,639.60x = 311,344.20 × 82,839.60
  4. Step 4: Simplify right side
    207,639.60x = 25,791,628,990.32
  5. Step 5: Solve for x
    x = 25,791,628,990.32/207,639.60
  6. Step 6: Final answer
    x = 124,213.44

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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.