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Finding the Fourth Proportional to 219,861,350.70, 329,978,030.40 and 90,561,755.40

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Solution

The fourth proportional to 219,861,350.70, 329,978,030.40 and 90,561,755.40 is: 135,919,249.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,861,350.70 : 329,978,030.40 = 90,561,755.40 : x
  2. Step 2: Convert to fraction form
    219,861,350.70/329,978,030.40 = 90,561,755.40/x
  3. Step 3: Cross multiply
    219,861,350.70x = 329,978,030.40 × 90,561,755.40
  4. Step 4: Simplify right side
    219,861,350.70x = 29,883,389,676,458,564
  5. Step 5: Solve for x
    x = 29,883,389,676,458,564/219,861,350.70
  6. Step 6: Final answer
    x = 135,919,249.02

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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.