Home / 100,297.28-138,408.36-54,974

Finding the Fourth Proportional to 100,297.28, 138,408.36 and 54,974

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Solution

The fourth proportional to 100,297.28, 138,408.36 and 54,974 is: 75,863.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,297.28 : 138,408.36 = 54,974 : x
  2. Step 2: Convert to fraction form
    100,297.28/138,408.36 = 54,974/x
  3. Step 3: Cross multiply
    100,297.28x = 138,408.36 × 54,974
  4. Step 4: Simplify right side
    100,297.28x = 7,608,861,182.64
  5. Step 5: Solve for x
    x = 7,608,861,182.64/100,297.28
  6. Step 6: Final answer
    x = 75,863.09

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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.