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Finding the Fourth Proportional to 126,620.96, 174,790.74 and 78,897.89

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Solution

The fourth proportional to 126,620.96, 174,790.74 and 78,897.89 is: 108,912.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,620.96 : 174,790.74 = 78,897.89 : x
  2. Step 2: Convert to fraction form
    126,620.96/174,790.74 = 78,897.89/x
  3. Step 3: Cross multiply
    126,620.96x = 174,790.74 × 78,897.89
  4. Step 4: Simplify right side
    126,620.96x = 13,790,620,577.54
  5. Step 5: Solve for x
    x = 13,790,620,577.54/126,620.96
  6. Step 6: Final answer
    x = 108,912.62

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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.