Home / 138,801.82-191,546.61-75,139.66

Finding the Fourth Proportional to 138,801.82, 191,546.61 and 75,139.66

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Solution

The fourth proportional to 138,801.82, 191,546.61 and 75,139.66 is: 103,692.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.82 : 191,546.61 = 75,139.66 : x
  2. Step 2: Convert to fraction form
    138,801.82/191,546.61 = 75,139.66/x
  3. Step 3: Cross multiply
    138,801.82x = 191,546.61 × 75,139.66
  4. Step 4: Simplify right side
    138,801.82x = 14,392,747,149.55
  5. Step 5: Solve for x
    x = 14,392,747,149.55/138,801.82
  6. Step 6: Final answer
    x = 103,692.78

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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.