Home / 81,418.70-122,122.20-25,257.35

Finding the Fourth Proportional to 81,418.70, 122,122.20 and 25,257.35

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Solution

The fourth proportional to 81,418.70, 122,122.20 and 25,257.35 is: 37,884.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,418.70 : 122,122.20 = 25,257.35 : x
  2. Step 2: Convert to fraction form
    81,418.70/122,122.20 = 25,257.35/x
  3. Step 3: Cross multiply
    81,418.70x = 122,122.20 × 25,257.35
  4. Step 4: Simplify right side
    81,418.70x = 3,084,483,021.88
  5. Step 5: Solve for x
    x = 3,084,483,021.88/81,418.70
  6. Step 6: Final answer
    x = 37,884.21

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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.