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Finding the Fourth Proportional to 81,241.52, 121,817 and 25,065.68

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Solution

The fourth proportional to 81,241.52, 121,817 and 25,065.68 is: 37,584.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,241.52 : 121,817 = 25,065.68 : x
  2. Step 2: Convert to fraction form
    81,241.52/121,817 = 25,065.68/x
  3. Step 3: Cross multiply
    81,241.52x = 121,817 × 25,065.68
  4. Step 4: Simplify right side
    81,241.52x = 3,053,425,940.56
  5. Step 5: Solve for x
    x = 3,053,425,940.56/81,241.52
  6. Step 6: Final answer
    x = 37,584.55

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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.