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Finding the Fourth Proportional to 122,007.88, 168,319.92 and 79,564.96

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Solution

The fourth proportional to 122,007.88, 168,319.92 and 79,564.96 is: 109,766.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,007.88 : 168,319.92 = 79,564.96 : x
  2. Step 2: Convert to fraction form
    122,007.88/168,319.92 = 79,564.96/x
  3. Step 3: Cross multiply
    122,007.88x = 168,319.92 × 79,564.96
  4. Step 4: Simplify right side
    122,007.88x = 13,392,367,702.00
  5. Step 5: Solve for x
    x = 13,392,367,702.00/122,007.88
  6. Step 6: Final answer
    x = 109,766.42

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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.