Home / 100,518.29-138,708.94-55,195.96

Finding the Fourth Proportional to 100,518.29, 138,708.94 and 55,195.96

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Solution

The fourth proportional to 100,518.29, 138,708.94 and 55,195.96 is: 76,166.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,518.29 : 138,708.94 = 55,195.96 : x
  2. Step 2: Convert to fraction form
    100,518.29/138,708.94 = 55,195.96/x
  3. Step 3: Cross multiply
    100,518.29x = 138,708.94 × 55,195.96
  4. Step 4: Simplify right side
    100,518.29x = 7,656,173,103.88
  5. Step 5: Solve for x
    x = 7,656,173,103.88/100,518.29
  6. Step 6: Final answer
    x = 76,166.97

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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.