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Finding the Fourth Proportional to 85,981.26, 129,042.96 and 43,892.44

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Solution

The fourth proportional to 85,981.26, 129,042.96 and 43,892.44 is: 65,874.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,981.26 : 129,042.96 = 43,892.44 : x
  2. Step 2: Convert to fraction form
    85,981.26/129,042.96 = 43,892.44/x
  3. Step 3: Cross multiply
    85,981.26x = 129,042.96 × 43,892.44
  4. Step 4: Simplify right side
    85,981.26x = 5,664,010,379.22
  5. Step 5: Solve for x
    x = 5,664,010,379.22/85,981.26
  6. Step 6: Final answer
    x = 65,874.94

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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.