Home / 100,549.40-138,759.30-55,228.43

Finding the Fourth Proportional to 100,549.40, 138,759.30 and 55,228.43

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Solution

The fourth proportional to 100,549.40, 138,759.30 and 55,228.43 is: 76,215.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,549.40 : 138,759.30 = 55,228.43 : x
  2. Step 2: Convert to fraction form
    100,549.40/138,759.30 = 55,228.43/x
  3. Step 3: Cross multiply
    100,549.40x = 138,759.30 × 55,228.43
  4. Step 4: Simplify right side
    100,549.40x = 7,663,458,789.13
  5. Step 5: Solve for x
    x = 7,663,458,789.13/100,549.40
  6. Step 6: Final answer
    x = 76,215.86

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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.