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Finding the Fourth Proportional to 207,365.27, 311,122.82 and 72,449.30

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Solution

The fourth proportional to 207,365.27, 311,122.82 and 72,449.30 is: 108,700.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,365.27 : 311,122.82 = 72,449.30 : x
  2. Step 2: Convert to fraction form
    207,365.27/311,122.82 = 72,449.30/x
  3. Step 3: Cross multiply
    207,365.27x = 311,122.82 × 72,449.30
  4. Step 4: Simplify right side
    207,365.27x = 22,540,631,481.96
  5. Step 5: Solve for x
    x = 22,540,631,481.96/207,365.27
  6. Step 6: Final answer
    x = 108,700.13

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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.