Home / 100,481.46-138,666.24-55,163.72

Finding the Fourth Proportional to 100,481.46, 138,666.24 and 55,163.72

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Solution

The fourth proportional to 100,481.46, 138,666.24 and 55,163.72 is: 76,126.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,481.46 : 138,666.24 = 55,163.72 : x
  2. Step 2: Convert to fraction form
    100,481.46/138,666.24 = 55,163.72/x
  3. Step 3: Cross multiply
    100,481.46x = 138,666.24 × 55,163.72
  4. Step 4: Simplify right side
    100,481.46x = 7,649,344,943.48
  5. Step 5: Solve for x
    x = 7,649,344,943.48/100,481.46
  6. Step 6: Final answer
    x = 76,126.93

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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.