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Finding the Fourth Proportional to 85,640.36, 118,207.43 and 49,837.28

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Solution

The fourth proportional to 85,640.36, 118,207.43 and 49,837.28 is: 68,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,640.36 : 118,207.43 = 49,837.28 : x
  2. Step 2: Convert to fraction form
    85,640.36/118,207.43 = 49,837.28/x
  3. Step 3: Cross multiply
    85,640.36x = 118,207.43 × 49,837.28
  4. Step 4: Simplify right side
    85,640.36x = 5,891,135,993.49
  5. Step 5: Solve for x
    x = 5,891,135,993.49/85,640.36
  6. Step 6: Final answer
    x = 68,789.25

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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.