Home / 81,381.20-122,150.70-39,290.96

Finding the Fourth Proportional to 81,381.20, 122,150.70 and 39,290.96

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Solution

The fourth proportional to 81,381.20, 122,150.70 and 39,290.96 is: 58,974.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.20 : 122,150.70 = 39,290.96 : x
  2. Step 2: Convert to fraction form
    81,381.20/122,150.70 = 39,290.96/x
  3. Step 3: Cross multiply
    81,381.20x = 122,150.70 × 39,290.96
  4. Step 4: Simplify right side
    81,381.20x = 4,799,418,573.05
  5. Step 5: Solve for x
    x = 4,799,418,573.05/81,381.20
  6. Step 6: Final answer
    x = 58,974.54

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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.