Home / 100,205.39-138,282.05-54,883.36

Finding the Fourth Proportional to 100,205.39, 138,282.05 and 54,883.36

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Solution

The fourth proportional to 100,205.39, 138,282.05 and 54,883.36 is: 75,738.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,205.39 : 138,282.05 = 54,883.36 : x
  2. Step 2: Convert to fraction form
    100,205.39/138,282.05 = 54,883.36/x
  3. Step 3: Cross multiply
    100,205.39x = 138,282.05 × 54,883.36
  4. Step 4: Simplify right side
    100,205.39x = 7,589,383,841.75
  5. Step 5: Solve for x
    x = 7,589,383,841.75/100,205.39
  6. Step 6: Final answer
    x = 75,738.28

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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.