Home / 91,859.70-137,789.55-81,837.30

Finding the Fourth Proportional to 91,859.70, 137,789.55 and 81,837.30

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Solution

The fourth proportional to 91,859.70, 137,789.55 and 81,837.30 is: 122,755.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,859.70 : 137,789.55 = 81,837.30 : x
  2. Step 2: Convert to fraction form
    91,859.70/137,789.55 = 81,837.30/x
  3. Step 3: Cross multiply
    91,859.70x = 137,789.55 × 81,837.30
  4. Step 4: Simplify right side
    91,859.70x = 11,276,324,740.22
  5. Step 5: Solve for x
    x = 11,276,324,740.22/91,859.70
  6. Step 6: Final answer
    x = 122,755.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.