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Finding the Fourth Proportional to 139,968,115.80, 209,952,173.70 and 71,817,696.60

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Solution

The fourth proportional to 139,968,115.80, 209,952,173.70 and 71,817,696.60 is: 107,726,544.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,115.80 : 209,952,173.70 = 71,817,696.60 : x
  2. Step 2: Convert to fraction form
    139,968,115.80/209,952,173.70 = 71,817,696.60/x
  3. Step 3: Cross multiply
    139,968,115.80x = 209,952,173.70 × 71,817,696.60
  4. Step 4: Simplify right side
    139,968,115.80x = 15,078,281,511,297,098
  5. Step 5: Solve for x
    x = 15,078,281,511,297,098/139,968,115.80
  6. Step 6: Final answer
    x = 107,726,544.90

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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.