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Finding the Fourth Proportional to 128,250.34, 192,414.42 and 90,882.68

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Solution

The fourth proportional to 128,250.34, 192,414.42 and 90,882.68 is: 136,351.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,250.34 : 192,414.42 = 90,882.68 : x
  2. Step 2: Convert to fraction form
    128,250.34/192,414.42 = 90,882.68/x
  3. Step 3: Cross multiply
    128,250.34x = 192,414.42 × 90,882.68
  4. Step 4: Simplify right side
    128,250.34x = 17,487,137,198.17
  5. Step 5: Solve for x
    x = 17,487,137,198.17/128,250.34
  6. Step 6: Final answer
    x = 136,351.59

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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.