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Finding the Fourth Proportional to 128,497.82, 192,745.58 and 100,441.46

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Solution

The fourth proportional to 128,497.82, 192,745.58 and 100,441.46 is: 150,661.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,497.82 : 192,745.58 = 100,441.46 : x
  2. Step 2: Convert to fraction form
    128,497.82/192,745.58 = 100,441.46/x
  3. Step 3: Cross multiply
    128,497.82x = 192,745.58 × 100,441.46
  4. Step 4: Simplify right side
    128,497.82x = 19,359,647,463.75
  5. Step 5: Solve for x
    x = 19,359,647,463.75/128,497.82
  6. Step 6: Final answer
    x = 150,661.29

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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.