Home / 138,801.50-191,546.10-75,139.82

Finding the Fourth Proportional to 138,801.50, 191,546.10 and 75,139.82

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Solution

The fourth proportional to 138,801.50, 191,546.10 and 75,139.82 is: 103,692.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.50 : 191,546.10 = 75,139.82 : x
  2. Step 2: Convert to fraction form
    138,801.50/191,546.10 = 75,139.82/x
  3. Step 3: Cross multiply
    138,801.50x = 191,546.10 × 75,139.82
  4. Step 4: Simplify right side
    138,801.50x = 14,392,739,475.70
  5. Step 5: Solve for x
    x = 14,392,739,475.70/138,801.50
  6. Step 6: Final answer
    x = 103,692.97

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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.