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Finding the Fourth Proportional to 85,201.22, 117,578.13 and 49,412.45

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Solution

The fourth proportional to 85,201.22, 117,578.13 and 49,412.45 is: 68,189.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,201.22 : 117,578.13 = 49,412.45 : x
  2. Step 2: Convert to fraction form
    85,201.22/117,578.13 = 49,412.45/x
  3. Step 3: Cross multiply
    85,201.22x = 117,578.13 × 49,412.45
  4. Step 4: Simplify right side
    85,201.22x = 5,809,823,469.72
  5. Step 5: Solve for x
    x = 5,809,823,469.72/85,201.22
  6. Step 6: Final answer
    x = 68,189.44

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1.5x scale

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.