Home / 100,936.56-139,290.64-55,618.75

Finding the Fourth Proportional to 100,936.56, 139,290.64 and 55,618.75

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Solution

The fourth proportional to 100,936.56, 139,290.64 and 55,618.75 is: 76,752.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,936.56 : 139,290.64 = 55,618.75 : x
  2. Step 2: Convert to fraction form
    100,936.56/139,290.64 = 55,618.75/x
  3. Step 3: Cross multiply
    100,936.56x = 139,290.64 × 55,618.75
  4. Step 4: Simplify right side
    100,936.56x = 7,747,171,318.57
  5. Step 5: Solve for x
    x = 7,747,171,318.57/100,936.56
  6. Step 6: Final answer
    x = 76,752.87

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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.