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Finding the Fourth Proportional to 122,310.86, 168,790.76 and 91,629.60

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Solution

The fourth proportional to 122,310.86, 168,790.76 and 91,629.60 is: 126,450.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,310.86 : 168,790.76 = 91,629.60 : x
  2. Step 2: Convert to fraction form
    122,310.86/168,790.76 = 91,629.60/x
  3. Step 3: Cross multiply
    122,310.86x = 168,790.76 × 91,629.60
  4. Step 4: Simplify right side
    122,310.86x = 15,466,230,756.87
  5. Step 5: Solve for x
    x = 15,466,230,756.87/122,310.86
  6. Step 6: Final answer
    x = 126,450.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.