Home / 128,211.14-192,355.60-90,843.42

Finding the Fourth Proportional to 128,211.14, 192,355.60 and 90,843.42

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Solution

The fourth proportional to 128,211.14, 192,355.60 and 90,843.42 is: 136,292.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,211.14 : 192,355.60 = 90,843.42 : x
  2. Step 2: Convert to fraction form
    128,211.14/192,355.60 = 90,843.42/x
  3. Step 3: Cross multiply
    128,211.14x = 192,355.60 × 90,843.42
  4. Step 4: Simplify right side
    128,211.14x = 17,474,240,560.15
  5. Step 5: Solve for x
    x = 17,474,240,560.15/128,211.14
  6. Step 6: Final answer
    x = 136,292.69

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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.