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Finding the Fourth Proportional to 207,958.20, 312,010.20 and 74,842.80

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Solution

The fourth proportional to 207,958.20, 312,010.20 and 74,842.80 is: 112,290.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,958.20 : 312,010.20 = 74,842.80 : x
  2. Step 2: Convert to fraction form
    207,958.20/312,010.20 = 74,842.80/x
  3. Step 3: Cross multiply
    207,958.20x = 312,010.20 × 74,842.80
  4. Step 4: Simplify right side
    207,958.20x = 23,351,716,996.56
  5. Step 5: Solve for x
    x = 23,351,716,996.56/207,958.20
  6. Step 6: Final answer
    x = 112,290.44

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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.