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Finding the Fourth Proportional to 81,672.88, 122,431.56 and 26,230

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Solution

The fourth proportional to 81,672.88, 122,431.56 and 26,230 is: 39,320.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,672.88 : 122,431.56 = 26,230 : x
  2. Step 2: Convert to fraction form
    81,672.88/122,431.56 = 26,230/x
  3. Step 3: Cross multiply
    81,672.88x = 122,431.56 × 26,230
  4. Step 4: Simplify right side
    81,672.88x = 3,211,379,818.80
  5. Step 5: Solve for x
    x = 3,211,379,818.80/81,672.88
  6. Step 6: Final answer
    x = 39,320.03

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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.