Home / 81,932.60-122,769.30-68,713.40

Finding the Fourth Proportional to 81,932.60, 122,769.30 and 68,713.40

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Solution

The fourth proportional to 81,932.60, 122,769.30 and 68,713.40 is: 102,961.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,932.60 : 122,769.30 = 68,713.40 : x
  2. Step 2: Convert to fraction form
    81,932.60/122,769.30 = 68,713.40/x
  3. Step 3: Cross multiply
    81,932.60x = 122,769.30 × 68,713.40
  4. Step 4: Simplify right side
    81,932.60x = 8,435,896,018.62
  5. Step 5: Solve for x
    x = 8,435,896,018.62/81,932.60
  6. Step 6: Final answer
    x = 102,961.41

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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.