Home / 128,121.90-192,183.53-84,027.88

Finding the Fourth Proportional to 128,121.90, 192,183.53 and 84,027.88

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Solution

The fourth proportional to 128,121.90, 192,183.53 and 84,027.88 is: 126,042.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,121.90 : 192,183.53 = 84,027.88 : x
  2. Step 2: Convert to fraction form
    128,121.90/192,183.53 = 84,027.88/x
  3. Step 3: Cross multiply
    128,121.90x = 192,183.53 × 84,027.88
  4. Step 4: Simplify right side
    128,121.90x = 16,148,774,011.32
  5. Step 5: Solve for x
    x = 16,148,774,011.32/128,121.90
  6. Step 6: Final answer
    x = 126,042.27

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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.