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Finding the Fourth Proportional to 128,163.90, 192,279.45 and 49,280.70

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Solution

The fourth proportional to 128,163.90, 192,279.45 and 49,280.70 is: 73,933.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,163.90 : 192,279.45 = 49,280.70 : x
  2. Step 2: Convert to fraction form
    128,163.90/192,279.45 = 49,280.70/x
  3. Step 3: Cross multiply
    128,163.90x = 192,279.45 × 49,280.70
  4. Step 4: Simplify right side
    128,163.90x = 9,475,665,891.62
  5. Step 5: Solve for x
    x = 9,475,665,891.62/128,163.90
  6. Step 6: Final answer
    x = 73,933.97

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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.