Home / 128,310.68-192,453.64-39,540.35

Finding the Fourth Proportional to 128,310.68, 192,453.64 and 39,540.35

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Solution

The fourth proportional to 128,310.68, 192,453.64 and 39,540.35 is: 59,306.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310.68 : 192,453.64 = 39,540.35 : x
  2. Step 2: Convert to fraction form
    128,310.68/192,453.64 = 39,540.35/x
  3. Step 3: Cross multiply
    128,310.68x = 192,453.64 × 39,540.35
  4. Step 4: Simplify right side
    128,310.68x = 7,609,684,086.67
  5. Step 5: Solve for x
    x = 7,609,684,086.67/128,310.68
  6. Step 6: Final answer
    x = 59,306.71

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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.