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Finding the Fourth Proportional to 408,091.75, 612,172.91 and 112,603.75

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Solution

The fourth proportional to 408,091.75, 612,172.91 and 112,603.75 is: 168,915.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,091.75 : 612,172.91 = 112,603.75 : x
  2. Step 2: Convert to fraction form
    408,091.75/612,172.91 = 112,603.75/x
  3. Step 3: Cross multiply
    408,091.75x = 612,172.91 × 112,603.75
  4. Step 4: Simplify right side
    408,091.75x = 68,932,965,314.41
  5. Step 5: Solve for x
    x = 68,932,965,314.41/408,091.75
  6. Step 6: Final answer
    x = 168,915.36

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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.