Home / 81,302.40-121,991.94-28,736.64

Finding the Fourth Proportional to 81,302.40, 121,991.94 and 28,736.64

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Solution

The fourth proportional to 81,302.40, 121,991.94 and 28,736.64 is: 43,118.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,302.40 : 121,991.94 = 28,736.64 : x
  2. Step 2: Convert to fraction form
    81,302.40/121,991.94 = 28,736.64/x
  3. Step 3: Cross multiply
    81,302.40x = 121,991.94 × 28,736.64
  4. Step 4: Simplify right side
    81,302.40x = 3,505,638,462.68
  5. Step 5: Solve for x
    x = 3,505,638,462.68/81,302.40
  6. Step 6: Final answer
    x = 43,118.51

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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.