Home / 128,220.60-192,351.78-39,474.12

Finding the Fourth Proportional to 128,220.60, 192,351.78 and 39,474.12

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Solution

The fourth proportional to 128,220.60, 192,351.78 and 39,474.12 is: 59,217.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,220.60 : 192,351.78 = 39,474.12 : x
  2. Step 2: Convert to fraction form
    128,220.60/192,351.78 = 39,474.12/x
  3. Step 3: Cross multiply
    128,220.60x = 192,351.78 × 39,474.12
  4. Step 4: Simplify right side
    128,220.60x = 7,592,917,245.93
  5. Step 5: Solve for x
    x = 7,592,917,245.93/128,220.60
  6. Step 6: Final answer
    x = 59,217.61

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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.