Home / 100,942.65-139,288.68-57,919.77

Finding the Fourth Proportional to 100,942.65, 139,288.68 and 57,919.77

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Solution

The fourth proportional to 100,942.65, 139,288.68 and 57,919.77 is: 79,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,942.65 : 139,288.68 = 57,919.77 : x
  2. Step 2: Convert to fraction form
    100,942.65/139,288.68 = 57,919.77/x
  3. Step 3: Cross multiply
    100,942.65x = 139,288.68 × 57,919.77
  4. Step 4: Simplify right side
    100,942.65x = 8,067,568,309.20
  5. Step 5: Solve for x
    x = 8,067,568,309.20/100,942.65
  6. Step 6: Final answer
    x = 79,922.30

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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.