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Finding the Fourth Proportional to 68,081.21, 93,945.49 and 39,395.15

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Solution

The fourth proportional to 68,081.21, 93,945.49 and 39,395.15 is: 54,361.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,081.21 : 93,945.49 = 39,395.15 : x
  2. Step 2: Convert to fraction form
    68,081.21/93,945.49 = 39,395.15/x
  3. Step 3: Cross multiply
    68,081.21x = 93,945.49 × 39,395.15
  4. Step 4: Simplify right side
    68,081.21x = 3,700,996,806.75
  5. Step 5: Solve for x
    x = 3,700,996,806.75/68,081.21
  6. Step 6: Final answer
    x = 54,361.50

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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.