Home / 100,215.45-138,299.30-54,893.43

Finding the Fourth Proportional to 100,215.45, 138,299.30 and 54,893.43

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Solution

The fourth proportional to 100,215.45, 138,299.30 and 54,893.43 is: 75,754.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,215.45 : 138,299.30 = 54,893.43 : x
  2. Step 2: Convert to fraction form
    100,215.45/138,299.30 = 54,893.43/x
  3. Step 3: Cross multiply
    100,215.45x = 138,299.30 × 54,893.43
  4. Step 4: Simplify right side
    100,215.45x = 7,591,722,252.10
  5. Step 5: Solve for x
    x = 7,591,722,252.10/100,215.45
  6. Step 6: Final answer
    x = 75,754.01

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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.