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Finding the Fourth Proportional to 86,687.32, 129,979.09 and 36,025.25

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Solution

The fourth proportional to 86,687.32, 129,979.09 and 36,025.25 is: 54,016.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,687.32 : 129,979.09 = 36,025.25 : x
  2. Step 2: Convert to fraction form
    86,687.32/129,979.09 = 36,025.25/x
  3. Step 3: Cross multiply
    86,687.32x = 129,979.09 × 36,025.25
  4. Step 4: Simplify right side
    86,687.32x = 4,682,529,212.02
  5. Step 5: Solve for x
    x = 4,682,529,212.02/86,687.32
  6. Step 6: Final answer
    x = 54,016.31

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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.