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Finding the Fourth Proportional to 68,645.39, 94,735.88 and 39,578.48

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Solution

The fourth proportional to 68,645.39, 94,735.88 and 39,578.48 is: 54,621.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,645.39 : 94,735.88 = 39,578.48 : x
  2. Step 2: Convert to fraction form
    68,645.39/94,735.88 = 39,578.48/x
  3. Step 3: Cross multiply
    68,645.39x = 94,735.88 × 39,578.48
  4. Step 4: Simplify right side
    68,645.39x = 3,749,502,467.65
  5. Step 5: Solve for x
    x = 3,749,502,467.65/68,645.39
  6. Step 6: Final answer
    x = 54,621.33

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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.