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Finding the Fourth Proportional to 198,511.56, 273,973.32 and 122,078.88

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Solution

The fourth proportional to 198,511.56, 273,973.32 and 122,078.88 is: 168,485.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,511.56 : 273,973.32 = 122,078.88 : x
  2. Step 2: Convert to fraction form
    198,511.56/273,973.32 = 122,078.88/x
  3. Step 3: Cross multiply
    198,511.56x = 273,973.32 × 122,078.88
  4. Step 4: Simplify right side
    198,511.56x = 33,446,356,055.48
  5. Step 5: Solve for x
    x = 33,446,356,055.48/198,511.56
  6. Step 6: Final answer
    x = 168,485.68

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1.5x scale

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.