Home / 217,021.10-325,422.30-128,301.80

Finding the Fourth Proportional to 217,021.10, 325,422.30 and 128,301.80

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Solution

The fourth proportional to 217,021.10, 325,422.30 and 128,301.80 is: 192,388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,021.10 : 325,422.30 = 128,301.80 : x
  2. Step 2: Convert to fraction form
    217,021.10/325,422.30 = 128,301.80/x
  3. Step 3: Cross multiply
    217,021.10x = 325,422.30 × 128,301.80
  4. Step 4: Simplify right side
    217,021.10x = 41,752,266,850.14
  5. Step 5: Solve for x
    x = 41,752,266,850.14/217,021.10
  6. Step 6: Final answer
    x = 192,388.05

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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.