Home / 100,843.12-139,163.52-55,521.28

Finding the Fourth Proportional to 100,843.12, 139,163.52 and 55,521.28

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Solution

The fourth proportional to 100,843.12, 139,163.52 and 55,521.28 is: 76,619.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,843.12 : 139,163.52 = 55,521.28 : x
  2. Step 2: Convert to fraction form
    100,843.12/139,163.52 = 55,521.28/x
  3. Step 3: Cross multiply
    100,843.12x = 139,163.52 × 55,521.28
  4. Step 4: Simplify right side
    100,843.12x = 7,726,536,759.71
  5. Step 5: Solve for x
    x = 7,726,536,759.71/100,843.12
  6. Step 6: Final answer
    x = 76,619.37

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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.