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Finding the Fourth Proportional to 207,843.80, 311,765.70 and 74,728.40

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Solution

The fourth proportional to 207,843.80, 311,765.70 and 74,728.40 is: 112,092.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,843.80 : 311,765.70 = 74,728.40 : x
  2. Step 2: Convert to fraction form
    207,843.80/311,765.70 = 74,728.40/x
  3. Step 3: Cross multiply
    207,843.80x = 311,765.70 × 74,728.40
  4. Step 4: Simplify right side
    207,843.80x = 23,297,751,935.88
  5. Step 5: Solve for x
    x = 23,297,751,935.88/207,843.80
  6. Step 6: Final answer
    x = 112,092.60

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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.