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Finding the Fourth Proportional to 68,740, 94,846.80 and 40,448.80

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Solution

The fourth proportional to 68,740, 94,846.80 and 40,448.80 is: 55,810.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,740 : 94,846.80 = 40,448.80 : x
  2. Step 2: Convert to fraction form
    68,740/94,846.80 = 40,448.80/x
  3. Step 3: Cross multiply
    68,740x = 94,846.80 × 40,448.80
  4. Step 4: Simplify right side
    68,740x = 3,836,439,243.84
  5. Step 5: Solve for x
    x = 3,836,439,243.84/68,740
  6. Step 6: Final answer
    x = 55,810.87

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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.