Home / 81,131.19-121,638.45-36,735.09

Finding the Fourth Proportional to 81,131.19, 121,638.45 and 36,735.09

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Solution

The fourth proportional to 81,131.19, 121,638.45 and 36,735.09 is: 55,076.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,131.19 : 121,638.45 = 36,735.09 : x
  2. Step 2: Convert to fraction form
    81,131.19/121,638.45 = 36,735.09/x
  3. Step 3: Cross multiply
    81,131.19x = 121,638.45 × 36,735.09
  4. Step 4: Simplify right side
    81,131.19x = 4,468,399,408.21
  5. Step 5: Solve for x
    x = 4,468,399,408.21/81,131.19
  6. Step 6: Final answer
    x = 55,076.22

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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.