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Finding the Fourth Proportional to 122,006.88, 168,318.54 and 79,563.96

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Solution

The fourth proportional to 122,006.88, 168,318.54 and 79,563.96 is: 109,765.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,006.88 : 168,318.54 = 79,563.96 : x
  2. Step 2: Convert to fraction form
    122,006.88/168,318.54 = 79,563.96/x
  3. Step 3: Cross multiply
    122,006.88x = 168,318.54 × 79,563.96
  4. Step 4: Simplify right side
    122,006.88x = 13,392,089,583.82
  5. Step 5: Solve for x
    x = 13,392,089,583.82/122,006.88
  6. Step 6: Final answer
    x = 109,765.04

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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.