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Finding the Fourth Proportional to 81,670.73, 122,448.15 and 31,708.71

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Solution

The fourth proportional to 81,670.73, 122,448.15 and 31,708.71 is: 47,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,670.73 : 122,448.15 = 31,708.71 : x
  2. Step 2: Convert to fraction form
    81,670.73/122,448.15 = 31,708.71/x
  3. Step 3: Cross multiply
    81,670.73x = 122,448.15 × 31,708.71
  4. Step 4: Simplify right side
    81,670.73x = 3,882,672,878.39
  5. Step 5: Solve for x
    x = 3,882,672,878.39/81,670.73
  6. Step 6: Final answer
    x = 47,540.57

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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.