Home / 131,181.40-196,917.90-81,317.80

Finding the Fourth Proportional to 131,181.40, 196,917.90 and 81,317.80

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Solution

The fourth proportional to 131,181.40, 196,917.90 and 81,317.80 is: 122,067.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,181.40 : 196,917.90 = 81,317.80 : x
  2. Step 2: Convert to fraction form
    131,181.40/196,917.90 = 81,317.80/x
  3. Step 3: Cross multiply
    131,181.40x = 196,917.90 × 81,317.80
  4. Step 4: Simplify right side
    131,181.40x = 16,012,930,408.62
  5. Step 5: Solve for x
    x = 16,012,930,408.62/131,181.40
  6. Step 6: Final answer
    x = 122,067.08

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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.