Home / 81,134.35-121,711.78-27,811.88

Finding the Fourth Proportional to 81,134.35, 121,711.78 and 27,811.88

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Solution

The fourth proportional to 81,134.35, 121,711.78 and 27,811.88 is: 41,721.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,134.35 : 121,711.78 = 27,811.88 : x
  2. Step 2: Convert to fraction form
    81,134.35/121,711.78 = 27,811.88/x
  3. Step 3: Cross multiply
    81,134.35x = 121,711.78 × 27,811.88
  4. Step 4: Simplify right side
    81,134.35x = 3,385,032,741.86
  5. Step 5: Solve for x
    x = 3,385,032,741.86/81,134.35
  6. Step 6: Final answer
    x = 41,721.33

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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.