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Finding the Fourth Proportional to 220,851,508.80, 331,274,152.80 and 99,682,766.40

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Solution

The fourth proportional to 220,851,508.80, 331,274,152.80 and 99,682,766.40 is: 149,522,745.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,851,508.80 : 331,274,152.80 = 99,682,766.40 : x
  2. Step 2: Convert to fraction form
    220,851,508.80/331,274,152.80 = 99,682,766.40/x
  3. Step 3: Cross multiply
    220,851,508.80x = 331,274,152.80 × 99,682,766.40
  4. Step 4: Simplify right side
    220,851,508.80x = 33,022,323,987,920,308
  5. Step 5: Solve for x
    x = 33,022,323,987,920,308/220,851,508.80
  6. Step 6: Final answer
    x = 149,522,745.70

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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.