Home / 415,712,627.20-623,568,940.80-128,527,321.60

Finding the Fourth Proportional to 415,712,627.20, 623,568,940.80 and 128,527,321.60

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Solution

The fourth proportional to 415,712,627.20, 623,568,940.80 and 128,527,321.60 is: 192,790,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,712,627.20 : 623,568,940.80 = 128,527,321.60 : x
  2. Step 2: Convert to fraction form
    415,712,627.20/623,568,940.80 = 128,527,321.60/x
  3. Step 3: Cross multiply
    415,712,627.20x = 623,568,940.80 × 128,527,321.60
  4. Step 4: Simplify right side
    415,712,627.20x = 80,145,645,793,972,944
  5. Step 5: Solve for x
    x = 80,145,645,793,972,944/415,712,627.20
  6. Step 6: Final answer
    x = 192,790,982.40

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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.