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Finding the Fourth Proportional to 79,605.09, 109,809.41 and 49,745.25

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Solution

The fourth proportional to 79,605.09, 109,809.41 and 49,745.25 is: 68,619.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,605.09 : 109,809.41 = 49,745.25 : x
  2. Step 2: Convert to fraction form
    79,605.09/109,809.41 = 49,745.25/x
  3. Step 3: Cross multiply
    79,605.09x = 109,809.41 × 49,745.25
  4. Step 4: Simplify right side
    79,605.09x = 5,462,496,304.08
  5. Step 5: Solve for x
    x = 5,462,496,304.08/79,605.09
  6. Step 6: Final answer
    x = 68,619.94

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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.