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Finding the Fourth Proportional to 122,107.76, 168,504.08 and 68,390.16

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Solution

The fourth proportional to 122,107.76, 168,504.08 and 68,390.16 is: 94,375.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,107.76 : 168,504.08 = 68,390.16 : x
  2. Step 2: Convert to fraction form
    122,107.76/168,504.08 = 68,390.16/x
  3. Step 3: Cross multiply
    122,107.76x = 168,504.08 × 68,390.16
  4. Step 4: Simplify right side
    122,107.76x = 11,524,020,991.85
  5. Step 5: Solve for x
    x = 11,524,020,991.85/122,107.76
  6. Step 6: Final answer
    x = 94,375.83

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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.