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Finding the Fourth Proportional to 139,978,859.20, 209,968,288.80 and 88,897,537.60

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Solution

The fourth proportional to 139,978,859.20, 209,968,288.80 and 88,897,537.60 is: 133,346,306.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,978,859.20 : 209,968,288.80 = 88,897,537.60 : x
  2. Step 2: Convert to fraction form
    139,978,859.20/209,968,288.80 = 88,897,537.60/x
  3. Step 3: Cross multiply
    139,978,859.20x = 209,968,288.80 × 88,897,537.60
  4. Step 4: Simplify right side
    139,978,859.20x = 18,665,663,848,405,660
  5. Step 5: Solve for x
    x = 18,665,663,848,405,660/139,978,859.20
  6. Step 6: Final answer
    x = 133,346,306.40

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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.