Home / 68,664.75-94,749.38-39,990.68

Finding the Fourth Proportional to 68,664.75, 94,749.38 and 39,990.68

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Solution

The fourth proportional to 68,664.75, 94,749.38 and 39,990.68 is: 55,182.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,664.75 : 94,749.38 = 39,990.68 : x
  2. Step 2: Convert to fraction form
    68,664.75/94,749.38 = 39,990.68/x
  3. Step 3: Cross multiply
    68,664.75x = 94,749.38 × 39,990.68
  4. Step 4: Simplify right side
    68,664.75x = 3,789,092,135.78
  5. Step 5: Solve for x
    x = 3,789,092,135.78/68,664.75
  6. Step 6: Final answer
    x = 55,182.49

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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.