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Finding the Fourth Proportional to 198,685,272.20, 298,367,978.70 and 107,986,008.20

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Solution

The fourth proportional to 198,685,272.20, 298,367,978.70 and 107,986,008.20 is: 162,163,841.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,685,272.20 : 298,367,978.70 = 107,986,008.20 : x
  2. Step 2: Convert to fraction form
    198,685,272.20/298,367,978.70 = 107,986,008.20/x
  3. Step 3: Cross multiply
    198,685,272.20x = 298,367,978.70 × 107,986,008.20
  4. Step 4: Simplify right side
    198,685,272.20x = 32,219,566,994,515,624
  5. Step 5: Solve for x
    x = 32,219,566,994,515,624/198,685,272.20
  6. Step 6: Final answer
    x = 162,163,841.53

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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.