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Finding the Fourth Proportional to 139,978,837.20, 209,968,255.80 and 88,897,515.60

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Solution

The fourth proportional to 139,978,837.20, 209,968,255.80 and 88,897,515.60 is: 133,346,273.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,978,837.20 : 209,968,255.80 = 88,897,515.60 : x
  2. Step 2: Convert to fraction form
    139,978,837.20/209,968,255.80 = 88,897,515.60/x
  3. Step 3: Cross multiply
    139,978,837.20x = 209,968,255.80 × 88,897,515.60
  4. Step 4: Simplify right side
    139,978,837.20x = 18,665,656,295,485,292
  5. Step 5: Solve for x
    x = 18,665,656,295,485,292/139,978,837.20
  6. Step 6: Final answer
    x = 133,346,273.40

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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.