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Finding the Fourth Proportional to 115,958.44, 173,995.98 and 86,435.56

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Solution

The fourth proportional to 115,958.44, 173,995.98 and 86,435.56 is: 129,696.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,958.44 : 173,995.98 = 86,435.56 : x
  2. Step 2: Convert to fraction form
    115,958.44/173,995.98 = 86,435.56/x
  3. Step 3: Cross multiply
    115,958.44x = 173,995.98 × 86,435.56
  4. Step 4: Simplify right side
    115,958.44x = 15,039,439,969.05
  5. Step 5: Solve for x
    x = 15,039,439,969.05/115,958.44
  6. Step 6: Final answer
    x = 129,696.81

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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.