Home / 100,371.20-138,512.24-55,659.20

Finding the Fourth Proportional to 100,371.20, 138,512.24 and 55,659.20

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Solution

The fourth proportional to 100,371.20, 138,512.24 and 55,659.20 is: 76,809.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,371.20 : 138,512.24 = 55,659.20 : x
  2. Step 2: Convert to fraction form
    100,371.20/138,512.24 = 55,659.20/x
  3. Step 3: Cross multiply
    100,371.20x = 138,512.24 × 55,659.20
  4. Step 4: Simplify right side
    100,371.20x = 7,709,479,497.75
  5. Step 5: Solve for x
    x = 7,709,479,497.75/100,371.20
  6. Step 6: Final answer
    x = 76,809.68

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1.5x scale

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.