Home / 87,789.09-121,150.50-49,556.28

Finding the Fourth Proportional to 87,789.09, 121,150.50 and 49,556.28

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Solution

The fourth proportional to 87,789.09, 121,150.50 and 49,556.28 is: 68,388.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,789.09 : 121,150.50 = 49,556.28 : x
  2. Step 2: Convert to fraction form
    87,789.09/121,150.50 = 49,556.28/x
  3. Step 3: Cross multiply
    87,789.09x = 121,150.50 × 49,556.28
  4. Step 4: Simplify right side
    87,789.09x = 6,003,768,100.14
  5. Step 5: Solve for x
    x = 6,003,768,100.14/87,789.09
  6. Step 6: Final answer
    x = 68,388.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.