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Finding the Fourth Proportional to 81,789.84, 122,684.60 and 25,634.27

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Solution

The fourth proportional to 81,789.84, 122,684.60 and 25,634.27 is: 38,451.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.84 : 122,684.60 = 25,634.27 : x
  2. Step 2: Convert to fraction form
    81,789.84/122,684.60 = 25,634.27/x
  3. Step 3: Cross multiply
    81,789.84x = 122,684.60 × 25,634.27
  4. Step 4: Simplify right side
    81,789.84x = 3,144,930,532.04
  5. Step 5: Solve for x
    x = 3,144,930,532.04/81,789.84
  6. Step 6: Final answer
    x = 38,451.36

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1.5x scale

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.