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Finding the Fourth Proportional to 253,405,651.88, 349,699,799.60 and 137,512,147.88

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Solution

The fourth proportional to 253,405,651.88, 349,699,799.60 and 137,512,147.88 is: 189,766,764.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,405,651.88 : 349,699,799.60 = 137,512,147.88 : x
  2. Step 2: Convert to fraction form
    253,405,651.88/349,699,799.60 = 137,512,147.88/x
  3. Step 3: Cross multiply
    253,405,651.88x = 349,699,799.60 × 137,512,147.88
  4. Step 4: Simplify right side
    253,405,651.88x = 48,087,970,553,765,512
  5. Step 5: Solve for x
    x = 48,087,970,553,765,512/253,405,651.88
  6. Step 6: Final answer
    x = 189,766,764.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.