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Finding the Fourth Proportional to 81,996.80, 122,930.40 and 35,211.20

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Solution

The fourth proportional to 81,996.80, 122,930.40 and 35,211.20 is: 52,788.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,996.80 : 122,930.40 = 35,211.20 : x
  2. Step 2: Convert to fraction form
    81,996.80/122,930.40 = 35,211.20/x
  3. Step 3: Cross multiply
    81,996.80x = 122,930.40 × 35,211.20
  4. Step 4: Simplify right side
    81,996.80x = 4,328,526,900.48
  5. Step 5: Solve for x
    x = 4,328,526,900.48/81,996.80
  6. Step 6: Final answer
    x = 52,788.97

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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.