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Finding the Fourth Proportional to 122,638.85, 169,233.87 and 68,923.09

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Solution

The fourth proportional to 122,638.85, 169,233.87 and 68,923.09 is: 95,109.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,638.85 : 169,233.87 = 68,923.09 : x
  2. Step 2: Convert to fraction form
    122,638.85/169,233.87 = 68,923.09/x
  3. Step 3: Cross multiply
    122,638.85x = 169,233.87 × 68,923.09
  4. Step 4: Simplify right side
    122,638.85x = 11,664,121,253.06
  5. Step 5: Solve for x
    x = 11,664,121,253.06/122,638.85
  6. Step 6: Final answer
    x = 95,109.51

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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.