Home / 81,270.20-121,918.84-27,960

Finding the Fourth Proportional to 81,270.20, 121,918.84 and 27,960

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Solution

The fourth proportional to 81,270.20, 121,918.84 and 27,960 is: 41,944.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,270.20 : 121,918.84 = 27,960 : x
  2. Step 2: Convert to fraction form
    81,270.20/121,918.84 = 27,960/x
  3. Step 3: Cross multiply
    81,270.20x = 121,918.84 × 27,960
  4. Step 4: Simplify right side
    81,270.20x = 3,408,850,766.40
  5. Step 5: Solve for x
    x = 3,408,850,766.40/81,270.20
  6. Step 6: Final answer
    x = 41,944.66

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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.