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Finding the Fourth Proportional to 86,131.78, 118,898.31 and 80,751.22

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Solution

The fourth proportional to 86,131.78, 118,898.31 and 80,751.22 is: 111,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,131.78 : 118,898.31 = 80,751.22 : x
  2. Step 2: Convert to fraction form
    86,131.78/118,898.31 = 80,751.22/x
  3. Step 3: Cross multiply
    86,131.78x = 118,898.31 × 80,751.22
  4. Step 4: Simplify right side
    86,131.78x = 9,601,183,588.44
  5. Step 5: Solve for x
    x = 9,601,183,588.44/86,131.78
  6. Step 6: Final answer
    x = 111,470.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.