Home / 78,344.21-117,435.88-30,940.09

Finding the Fourth Proportional to 78,344.21, 117,435.88 and 30,940.09

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Solution

The fourth proportional to 78,344.21, 117,435.88 and 30,940.09 is: 46,378.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,344.21 : 117,435.88 = 30,940.09 : x
  2. Step 2: Convert to fraction form
    78,344.21/117,435.88 = 30,940.09/x
  3. Step 3: Cross multiply
    78,344.21x = 117,435.88 × 30,940.09
  4. Step 4: Simplify right side
    78,344.21x = 3,633,476,325.49
  5. Step 5: Solve for x
    x = 3,633,476,325.49/78,344.21
  6. Step 6: Final answer
    x = 46,378.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.