Home / 100,581.82-138,799.11-55,872.70

Finding the Fourth Proportional to 100,581.82, 138,799.11 and 55,872.70

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Solution

The fourth proportional to 100,581.82, 138,799.11 and 55,872.70 is: 77,102.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,581.82 : 138,799.11 = 55,872.70 : x
  2. Step 2: Convert to fraction form
    100,581.82/138,799.11 = 55,872.70/x
  3. Step 3: Cross multiply
    100,581.82x = 138,799.11 × 55,872.70
  4. Step 4: Simplify right side
    100,581.82x = 7,755,081,033.30
  5. Step 5: Solve for x
    x = 7,755,081,033.30/100,581.82
  6. Step 6: Final answer
    x = 77,102.21

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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.