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Finding the Fourth Proportional to 81,610.40, 122,408.40 and 22,440.80

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Solution

The fourth proportional to 81,610.40, 122,408.40 and 22,440.80 is: 33,659.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,610.40 : 122,408.40 = 22,440.80 : x
  2. Step 2: Convert to fraction form
    81,610.40/122,408.40 = 22,440.80/x
  3. Step 3: Cross multiply
    81,610.40x = 122,408.40 × 22,440.80
  4. Step 4: Simplify right side
    81,610.40x = 2,746,942,422.72
  5. Step 5: Solve for x
    x = 2,746,942,422.72/81,610.40
  6. Step 6: Final answer
    x = 33,659.22

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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.