Home / 128,587.36-192,879.24-77,998.42

Finding the Fourth Proportional to 128,587.36, 192,879.24 and 77,998.42

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Solution

The fourth proportional to 128,587.36, 192,879.24 and 77,998.42 is: 116,996.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.36 : 192,879.24 = 77,998.42 : x
  2. Step 2: Convert to fraction form
    128,587.36/192,879.24 = 77,998.42/x
  3. Step 3: Cross multiply
    128,587.36x = 192,879.24 × 77,998.42
  4. Step 4: Simplify right side
    128,587.36x = 15,044,275,970.80
  5. Step 5: Solve for x
    x = 15,044,275,970.80/128,587.36
  6. Step 6: Final answer
    x = 116,996.54

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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.