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Finding the Fourth Proportional to 139,968,137.20, 209,952,205.80 and 125,229,506.80

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Solution

The fourth proportional to 139,968,137.20, 209,952,205.80 and 125,229,506.80 is: 187,844,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,137.20 : 209,952,205.80 = 125,229,506.80 : x
  2. Step 2: Convert to fraction form
    139,968,137.20/209,952,205.80 = 125,229,506.80/x
  3. Step 3: Cross multiply
    139,968,137.20x = 209,952,205.80 × 125,229,506.80
  4. Step 4: Simplify right side
    139,968,137.20x = 26,292,211,183,906,100
  5. Step 5: Solve for x
    x = 26,292,211,183,906,100/139,968,137.20
  6. Step 6: Final answer
    x = 187,844,260.20

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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.