Home / 80,578.41-120,849.38-30,640.69

Finding the Fourth Proportional to 80,578.41, 120,849.38 and 30,640.69

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Solution

The fourth proportional to 80,578.41, 120,849.38 and 30,640.69 is: 45,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,578.41 : 120,849.38 = 30,640.69 : x
  2. Step 2: Convert to fraction form
    80,578.41/120,849.38 = 30,640.69/x
  3. Step 3: Cross multiply
    80,578.41x = 120,849.38 × 30,640.69
  4. Step 4: Simplify right side
    80,578.41x = 3,702,908,389.27
  5. Step 5: Solve for x
    x = 3,702,908,389.27/80,578.41
  6. Step 6: Final answer
    x = 45,954.10

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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.