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Finding the Fourth Proportional to 207,920.20, 311,880.30 and 113,441.80

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Solution

The fourth proportional to 207,920.20, 311,880.30 and 113,441.80 is: 170,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,920.20 : 311,880.30 = 113,441.80 : x
  2. Step 2: Convert to fraction form
    207,920.20/311,880.30 = 113,441.80/x
  3. Step 3: Cross multiply
    207,920.20x = 311,880.30 × 113,441.80
  4. Step 4: Simplify right side
    207,920.20x = 35,380,262,616.54
  5. Step 5: Solve for x
    x = 35,380,262,616.54/207,920.20
  6. Step 6: Final answer
    x = 170,162.70

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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.