Home / 100,608.09-138,838.50-55,286.61

Finding the Fourth Proportional to 100,608.09, 138,838.50 and 55,286.61

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Solution

The fourth proportional to 100,608.09, 138,838.50 and 55,286.61 is: 76,295.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.09 : 138,838.50 = 55,286.61 : x
  2. Step 2: Convert to fraction form
    100,608.09/138,838.50 = 55,286.61/x
  3. Step 3: Cross multiply
    100,608.09x = 138,838.50 × 55,286.61
  4. Step 4: Simplify right side
    100,608.09x = 7,675,910,002.49
  5. Step 5: Solve for x
    x = 7,675,910,002.49/100,608.09
  6. Step 6: Final answer
    x = 76,295.16

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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.