Home / 81,789.99-122,634.75-31,811.84

Finding the Fourth Proportional to 81,789.99, 122,634.75 and 31,811.84

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Solution

The fourth proportional to 81,789.99, 122,634.75 and 31,811.84 is: 47,698.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.99 : 122,634.75 = 31,811.84 : x
  2. Step 2: Convert to fraction form
    81,789.99/122,634.75 = 31,811.84/x
  3. Step 3: Cross multiply
    81,789.99x = 122,634.75 × 31,811.84
  4. Step 4: Simplify right side
    81,789.99x = 3,901,237,011.44
  5. Step 5: Solve for x
    x = 3,901,237,011.44/81,789.99
  6. Step 6: Final answer
    x = 47,698.22

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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.