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Finding the Fourth Proportional to 81,915.67, 122,872.29 and 26,511.67

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Solution

The fourth proportional to 81,915.67, 122,872.29 and 26,511.67 is: 39,767.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,915.67 : 122,872.29 = 26,511.67 : x
  2. Step 2: Convert to fraction form
    81,915.67/122,872.29 = 26,511.67/x
  3. Step 3: Cross multiply
    81,915.67x = 122,872.29 × 26,511.67
  4. Step 4: Simplify right side
    81,915.67x = 3,257,549,604.62
  5. Step 5: Solve for x
    x = 3,257,549,604.62/81,915.67
  6. Step 6: Final answer
    x = 39,767.11

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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.