Home / 81,687.22-122,538.39-31,771.10

Finding the Fourth Proportional to 81,687.22, 122,538.39 and 31,771.10

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Solution

The fourth proportional to 81,687.22, 122,538.39 and 31,771.10 is: 47,659.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,687.22 : 122,538.39 = 31,771.10 : x
  2. Step 2: Convert to fraction form
    81,687.22/122,538.39 = 31,771.10/x
  3. Step 3: Cross multiply
    81,687.22x = 122,538.39 × 31,771.10
  4. Step 4: Simplify right side
    81,687.22x = 3,893,179,629.73
  5. Step 5: Solve for x
    x = 3,893,179,629.73/81,687.22
  6. Step 6: Final answer
    x = 47,659.59

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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.