Home / 81,895.70-122,793.06-31,917.62

Finding the Fourth Proportional to 81,895.70, 122,793.06 and 31,917.62

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Solution

The fourth proportional to 81,895.70, 122,793.06 and 31,917.62 is: 47,856.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,895.70 : 122,793.06 = 31,917.62 : x
  2. Step 2: Convert to fraction form
    81,895.70/122,793.06 = 31,917.62/x
  3. Step 3: Cross multiply
    81,895.70x = 122,793.06 × 31,917.62
  4. Step 4: Simplify right side
    81,895.70x = 3,919,262,227.72
  5. Step 5: Solve for x
    x = 3,919,262,227.72/81,895.70
  6. Step 6: Final answer
    x = 47,856.75

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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.