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Finding the Fourth Proportional to 78,625.80, 108,486.81 and 49,954.50

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Solution

The fourth proportional to 78,625.80, 108,486.81 and 49,954.50 is: 68,926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,625.80 : 108,486.81 = 49,954.50 : x
  2. Step 2: Convert to fraction form
    78,625.80/108,486.81 = 49,954.50/x
  3. Step 3: Cross multiply
    78,625.80x = 108,486.81 × 49,954.50
  4. Step 4: Simplify right side
    78,625.80x = 5,419,404,350.15
  5. Step 5: Solve for x
    x = 5,419,404,350.15/78,625.80
  6. Step 6: Final answer
    x = 68,926.54

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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.