Home / 81,799.60-122,696-25,638.48

Finding the Fourth Proportional to 81,799.60, 122,696 and 25,638.48

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Solution

The fourth proportional to 81,799.60, 122,696 and 25,638.48 is: 38,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,799.60 : 122,696 = 25,638.48 : x
  2. Step 2: Convert to fraction form
    81,799.60/122,696 = 25,638.48/x
  3. Step 3: Cross multiply
    81,799.60x = 122,696 × 25,638.48
  4. Step 4: Simplify right side
    81,799.60x = 3,145,738,942.08
  5. Step 5: Solve for x
    x = 3,145,738,942.08/81,799.60
  6. Step 6: Final answer
    x = 38,456.65

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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.