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Finding the Fourth Proportional to 81,780.84, 122,648.58 and 22,611.96

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Solution

The fourth proportional to 81,780.84, 122,648.58 and 22,611.96 is: 33,911.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.84 : 122,648.58 = 22,611.96 : x
  2. Step 2: Convert to fraction form
    81,780.84/122,648.58 = 22,611.96/x
  3. Step 3: Cross multiply
    81,780.84x = 122,648.58 × 22,611.96
  4. Step 4: Simplify right side
    81,780.84x = 2,773,324,785.02
  5. Step 5: Solve for x
    x = 2,773,324,785.02/81,780.84
  6. Step 6: Final answer
    x = 33,911.67

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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.