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Finding the Fourth Proportional to 139,968,167.20, 209,952,250.80 and 71,093,413.60

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Solution

The fourth proportional to 139,968,167.20, 209,952,250.80 and 71,093,413.60 is: 106,640,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,167.20 : 209,952,250.80 = 71,093,413.60 : x
  2. Step 2: Convert to fraction form
    139,968,167.20/209,952,250.80 = 71,093,413.60/x
  3. Step 3: Cross multiply
    139,968,167.20x = 209,952,250.80 × 71,093,413.60
  4. Step 4: Simplify right side
    139,968,167.20x = 14,926,222,202,375,330
  5. Step 5: Solve for x
    x = 14,926,222,202,375,330/139,968,167.20
  6. Step 6: Final answer
    x = 106,640,120.40

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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.