Home / 74,770.68-103,183.12-40,778.56

Finding the Fourth Proportional to 74,770.68, 103,183.12 and 40,778.56

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Solution

The fourth proportional to 74,770.68, 103,183.12 and 40,778.56 is: 56,274.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,770.68 : 103,183.12 = 40,778.56 : x
  2. Step 2: Convert to fraction form
    74,770.68/103,183.12 = 40,778.56/x
  3. Step 3: Cross multiply
    74,770.68x = 103,183.12 × 40,778.56
  4. Step 4: Simplify right side
    74,770.68x = 4,207,659,049.91
  5. Step 5: Solve for x
    x = 4,207,659,049.91/74,770.68
  6. Step 6: Final answer
    x = 56,274.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.