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Finding the Fourth Proportional to 122,620.70, 169,221.57 and 68,905.55

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Solution

The fourth proportional to 122,620.70, 169,221.57 and 68,905.55 is: 95,092.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,620.70 : 169,221.57 = 68,905.55 : x
  2. Step 2: Convert to fraction form
    122,620.70/169,221.57 = 68,905.55/x
  3. Step 3: Cross multiply
    122,620.70x = 169,221.57 × 68,905.55
  4. Step 4: Simplify right side
    122,620.70x = 11,660,305,352.71
  5. Step 5: Solve for x
    x = 11,660,305,352.71/122,620.70
  6. Step 6: Final answer
    x = 95,092.47

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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.