Home / 100,855.85-139,184.14-55,535.46

Finding the Fourth Proportional to 100,855.85, 139,184.14 and 55,535.46

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Solution

The fourth proportional to 100,855.85, 139,184.14 and 55,535.46 is: 76,640.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,855.85 : 139,184.14 = 55,535.46 : x
  2. Step 2: Convert to fraction form
    100,855.85/139,184.14 = 55,535.46/x
  3. Step 3: Cross multiply
    100,855.85x = 139,184.14 × 55,535.46
  4. Step 4: Simplify right side
    100,855.85x = 7,729,654,578.83
  5. Step 5: Solve for x
    x = 7,729,654,578.83/100,855.85
  6. Step 6: Final answer
    x = 76,640.62

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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.