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Finding the Fourth Proportional to 86,203.67, 129,173.87 and 36,256.43

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Solution

The fourth proportional to 86,203.67, 129,173.87 and 36,256.43 is: 54,329.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,203.67 : 129,173.87 = 36,256.43 : x
  2. Step 2: Convert to fraction form
    86,203.67/129,173.87 = 36,256.43/x
  3. Step 3: Cross multiply
    86,203.67x = 129,173.87 × 36,256.43
  4. Step 4: Simplify right side
    86,203.67x = 4,683,383,789.06
  5. Step 5: Solve for x
    x = 4,683,383,789.06/86,203.67
  6. Step 6: Final answer
    x = 54,329.29

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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.