Home / 81,876.66-122,788.86-31,944.60

Finding the Fourth Proportional to 81,876.66, 122,788.86 and 31,944.60

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Solution

The fourth proportional to 81,876.66, 122,788.86 and 31,944.60 is: 47,906.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,876.66 : 122,788.86 = 31,944.60 : x
  2. Step 2: Convert to fraction form
    81,876.66/122,788.86 = 31,944.60/x
  3. Step 3: Cross multiply
    81,876.66x = 122,788.86 × 31,944.60
  4. Step 4: Simplify right side
    81,876.66x = 3,922,441,017.16
  5. Step 5: Solve for x
    x = 3,922,441,017.16/81,876.66
  6. Step 6: Final answer
    x = 47,906.71

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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.