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Finding the Fourth Proportional to 99,794,274.60, 149,691,411.90 and 72,920,418.60

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Solution

The fourth proportional to 99,794,274.60, 149,691,411.90 and 72,920,418.60 is: 109,380,627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794,274.60 : 149,691,411.90 = 72,920,418.60 : x
  2. Step 2: Convert to fraction form
    99,794,274.60/149,691,411.90 = 72,920,418.60/x
  3. Step 3: Cross multiply
    99,794,274.60x = 149,691,411.90 × 72,920,418.60
  4. Step 4: Simplify right side
    99,794,274.60x = 10,915,560,416,573,020
  5. Step 5: Solve for x
    x = 10,915,560,416,573,020/99,794,274.60
  6. Step 6: Final answer
    x = 109,380,627.90

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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.