Home / 81,286.67-121,917.42-31,359.48

Finding the Fourth Proportional to 81,286.67, 121,917.42 and 31,359.48

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Solution

The fourth proportional to 81,286.67, 121,917.42 and 31,359.48 is: 47,034.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,286.67 : 121,917.42 = 31,359.48 : x
  2. Step 2: Convert to fraction form
    81,286.67/121,917.42 = 31,359.48/x
  3. Step 3: Cross multiply
    81,286.67x = 121,917.42 × 31,359.48
  4. Step 4: Simplify right side
    81,286.67x = 3,823,266,894.14
  5. Step 5: Solve for x
    x = 3,823,266,894.14/81,286.67
  6. Step 6: Final answer
    x = 47,034.37

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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.