Home / 100,999.28-139,379.97-55,679.03

Finding the Fourth Proportional to 100,999.28, 139,379.97 and 55,679.03

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Solution

The fourth proportional to 100,999.28, 139,379.97 and 55,679.03 is: 76,837.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,999.28 : 139,379.97 = 55,679.03 : x
  2. Step 2: Convert to fraction form
    100,999.28/139,379.97 = 55,679.03/x
  3. Step 3: Cross multiply
    100,999.28x = 139,379.97 × 55,679.03
  4. Step 4: Simplify right side
    100,999.28x = 7,760,540,834.13
  5. Step 5: Solve for x
    x = 7,760,540,834.13/100,999.28
  6. Step 6: Final answer
    x = 76,837.59

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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.