Home / 100,900.26-139,243.32-55,578.44

Finding the Fourth Proportional to 100,900.26, 139,243.32 and 55,578.44

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Solution

The fourth proportional to 100,900.26, 139,243.32 and 55,578.44 is: 76,698.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,900.26 : 139,243.32 = 55,578.44 : x
  2. Step 2: Convert to fraction form
    100,900.26/139,243.32 = 55,578.44/x
  3. Step 3: Cross multiply
    100,900.26x = 139,243.32 × 55,578.44
  4. Step 4: Simplify right side
    100,900.26x = 7,738,925,809.80
  5. Step 5: Solve for x
    x = 7,738,925,809.80/100,900.26
  6. Step 6: Final answer
    x = 76,698.77

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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.