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Finding the Fourth Proportional to 99,794,611.60, 149,691,917.40 and 72,920,755.60

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Solution

The fourth proportional to 99,794,611.60, 149,691,917.40 and 72,920,755.60 is: 109,381,133.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794,611.60 : 149,691,917.40 = 72,920,755.60 : x
  2. Step 2: Convert to fraction form
    99,794,611.60/149,691,917.40 = 72,920,755.60/x
  3. Step 3: Cross multiply
    99,794,611.60x = 149,691,917.40 × 72,920,755.60
  4. Step 4: Simplify right side
    99,794,611.60x = 10,915,647,724,020,786
  5. Step 5: Solve for x
    x = 10,915,647,724,020,786/99,794,611.60
  6. Step 6: Final answer
    x = 109,381,133.40

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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.