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Finding the Fourth Proportional to 312,794,380.80, 469,359,532.80 and 131,059,929.60

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Solution

The fourth proportional to 312,794,380.80, 469,359,532.80 and 131,059,929.60 is: 196,660,269.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,794,380.80 : 469,359,532.80 = 131,059,929.60 : x
  2. Step 2: Convert to fraction form
    312,794,380.80/469,359,532.80 = 131,059,929.60/x
  3. Step 3: Cross multiply
    312,794,380.80x = 469,359,532.80 × 131,059,929.60
  4. Step 4: Simplify right side
    312,794,380.80x = 61,514,227,325,856,888
  5. Step 5: Solve for x
    x = 61,514,227,325,856,888/312,794,380.80
  6. Step 6: Final answer
    x = 196,660,269.82

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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.