Home / 81,196.11-121,781.86-31,299.70

Finding the Fourth Proportional to 81,196.11, 121,781.86 and 31,299.70

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Solution

The fourth proportional to 81,196.11, 121,781.86 and 31,299.70 is: 46,944.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,196.11 : 121,781.86 = 31,299.70 : x
  2. Step 2: Convert to fraction form
    81,196.11/121,781.86 = 31,299.70/x
  3. Step 3: Cross multiply
    81,196.11x = 121,781.86 × 31,299.70
  4. Step 4: Simplify right side
    81,196.11x = 3,811,735,683.44
  5. Step 5: Solve for x
    x = 3,811,735,683.44/81,196.11
  6. Step 6: Final answer
    x = 46,944.81

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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.