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Finding the Fourth Proportional to 65,850.80, 98,798.37 and 20,879.49

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Solution

The fourth proportional to 65,850.80, 98,798.37 and 20,879.49 is: 31,326.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,850.80 : 98,798.37 = 20,879.49 : x
  2. Step 2: Convert to fraction form
    65,850.80/98,798.37 = 20,879.49/x
  3. Step 3: Cross multiply
    65,850.80x = 98,798.37 × 20,879.49
  4. Step 4: Simplify right side
    65,850.80x = 2,062,859,578.43
  5. Step 5: Solve for x
    x = 2,062,859,578.43/65,850.80
  6. Step 6: Final answer
    x = 31,326.27

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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.