Home / 81,638,661.60-122,640,469.20-68,201,733.60

Finding the Fourth Proportional to 81,638,661.60, 122,640,469.20 and 68,201,733.60

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Solution

The fourth proportional to 81,638,661.60, 122,640,469.20 and 68,201,733.60 is: 102,455,043.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,638,661.60 : 122,640,469.20 = 68,201,733.60 : x
  2. Step 2: Convert to fraction form
    81,638,661.60/122,640,469.20 = 68,201,733.60/x
  3. Step 3: Cross multiply
    81,638,661.60x = 122,640,469.20 × 68,201,733.60
  4. Step 4: Simplify right side
    81,638,661.60x = 8,364,292,608,957,405
  5. Step 5: Solve for x
    x = 8,364,292,608,957,405/81,638,661.60
  6. Step 6: Final answer
    x = 102,455,043.30

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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.