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Finding the Fourth Proportional to 122,104.78, 168,506.28 and 79,638.94

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Solution

The fourth proportional to 122,104.78, 168,506.28 and 79,638.94 is: 109,902.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,104.78 : 168,506.28 = 79,638.94 : x
  2. Step 2: Convert to fraction form
    122,104.78/168,506.28 = 79,638.94/x
  3. Step 3: Cross multiply
    122,104.78x = 168,506.28 × 79,638.94
  4. Step 4: Simplify right side
    122,104.78x = 13,419,661,522.54
  5. Step 5: Solve for x
    x = 13,419,661,522.54/122,104.78
  6. Step 6: Final answer
    x = 109,902.84

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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.