Home / 81,685,940.40-122,528,910.60-71,801,137.80

Finding the Fourth Proportional to 81,685,940.40, 122,528,910.60 and 71,801,137.80

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Solution

The fourth proportional to 81,685,940.40, 122,528,910.60 and 71,801,137.80 is: 107,701,706.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,685,940.40 : 122,528,910.60 = 71,801,137.80 : x
  2. Step 2: Convert to fraction form
    81,685,940.40/122,528,910.60 = 71,801,137.80/x
  3. Step 3: Cross multiply
    81,685,940.40x = 122,528,910.60 × 71,801,137.80
  4. Step 4: Simplify right side
    81,685,940.40x = 8,797,715,194,474,480
  5. Step 5: Solve for x
    x = 8,797,715,194,474,480/81,685,940.40
  6. Step 6: Final answer
    x = 107,701,706.70

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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.