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Finding the Fourth Proportional to 208,093,267.60, 311,803,978.20 and 131,278,829.20

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Solution

The fourth proportional to 208,093,267.60, 311,803,978.20 and 131,278,829.20 is: 196,706,321.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,093,267.60 : 311,803,978.20 = 131,278,829.20 : x
  2. Step 2: Convert to fraction form
    208,093,267.60/311,803,978.20 = 131,278,829.20/x
  3. Step 3: Cross multiply
    208,093,267.60x = 311,803,978.20 × 131,278,829.20
  4. Step 4: Simplify right side
    208,093,267.60x = 40,933,261,197,998,320
  5. Step 5: Solve for x
    x = 40,933,261,197,998,320/208,093,267.60
  6. Step 6: Final answer
    x = 196,706,321.50

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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.