Home / 115,431.25-159,361.38-87,991.96

Finding the Fourth Proportional to 115,431.25, 159,361.38 and 87,991.96

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Solution

The fourth proportional to 115,431.25, 159,361.38 and 87,991.96 is: 121,479.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,431.25 : 159,361.38 = 87,991.96 : x
  2. Step 2: Convert to fraction form
    115,431.25/159,361.38 = 87,991.96/x
  3. Step 3: Cross multiply
    115,431.25x = 159,361.38 × 87,991.96
  4. Step 4: Simplify right side
    115,431.25x = 14,022,520,174.50
  5. Step 5: Solve for x
    x = 14,022,520,174.50/115,431.25
  6. Step 6: Final answer
    x = 121,479.41

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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.