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Finding the Fourth Proportional to 225,980.91, 338,971.37 and 85,739.54

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Solution

The fourth proportional to 225,980.91, 338,971.37 and 85,739.54 is: 128,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,980.91 : 338,971.37 = 85,739.54 : x
  2. Step 2: Convert to fraction form
    225,980.91/338,971.37 = 85,739.54/x
  3. Step 3: Cross multiply
    225,980.91x = 338,971.37 × 85,739.54
  4. Step 4: Simplify right side
    225,980.91x = 29,063,247,213.42
  5. Step 5: Solve for x
    x = 29,063,247,213.42/225,980.91
  6. Step 6: Final answer
    x = 128,609.30

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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.