Home / 100,549.37-138,759.79-55,231.54

Finding the Fourth Proportional to 100,549.37, 138,759.79 and 55,231.54

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Solution

The fourth proportional to 100,549.37, 138,759.79 and 55,231.54 is: 76,220.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,549.37 : 138,759.79 = 55,231.54 : x
  2. Step 2: Convert to fraction form
    100,549.37/138,759.79 = 55,231.54/x
  3. Step 3: Cross multiply
    100,549.37x = 138,759.79 × 55,231.54
  4. Step 4: Simplify right side
    100,549.37x = 7,663,916,891.78
  5. Step 5: Solve for x
    x = 7,663,916,891.78/100,549.37
  6. Step 6: Final answer
    x = 76,220.44

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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.