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Finding the Fourth Proportional to 325,785.20, 488,386.20 and 126,039.20

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Solution

The fourth proportional to 325,785.20, 488,386.20 and 126,039.20 is: 188,945.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,785.20 : 488,386.20 = 126,039.20 : x
  2. Step 2: Convert to fraction form
    325,785.20/488,386.20 = 126,039.20/x
  3. Step 3: Cross multiply
    325,785.20x = 488,386.20 × 126,039.20
  4. Step 4: Simplify right side
    325,785.20x = 61,555,805,939.04
  5. Step 5: Solve for x
    x = 61,555,805,939.04/325,785.20
  6. Step 6: Final answer
    x = 188,945.99

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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.