Home / 100,549.49-138,759.96-55,231.66

Finding the Fourth Proportional to 100,549.49, 138,759.96 and 55,231.66

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Solution

The fourth proportional to 100,549.49, 138,759.96 and 55,231.66 is: 76,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,549.49 : 138,759.96 = 55,231.66 : x
  2. Step 2: Convert to fraction form
    100,549.49/138,759.96 = 55,231.66/x
  3. Step 3: Cross multiply
    100,549.49x = 138,759.96 × 55,231.66
  4. Step 4: Simplify right side
    100,549.49x = 7,663,942,932.33
  5. Step 5: Solve for x
    x = 7,663,942,932.33/100,549.49
  6. Step 6: Final answer
    x = 76,220.60

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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.