Home / 135,636.81-187,217.78-81,912.75

Finding the Fourth Proportional to 135,636.81, 187,217.78 and 81,912.75

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Solution

The fourth proportional to 135,636.81, 187,217.78 and 81,912.75 is: 113,063.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,636.81 : 187,217.78 = 81,912.75 : x
  2. Step 2: Convert to fraction form
    135,636.81/187,217.78 = 81,912.75/x
  3. Step 3: Cross multiply
    135,636.81x = 187,217.78 × 81,912.75
  4. Step 4: Simplify right side
    135,636.81x = 15,335,522,799.13
  5. Step 5: Solve for x
    x = 15,335,522,799.13/135,636.81
  6. Step 6: Final answer
    x = 113,063.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.