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Finding the Fourth Proportional to 122,705.89, 169,329.79 and 68,993.98

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Solution

The fourth proportional to 122,705.89, 169,329.79 and 68,993.98 is: 95,209.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,705.89 : 169,329.79 = 68,993.98 : x
  2. Step 2: Convert to fraction form
    122,705.89/169,329.79 = 68,993.98/x
  3. Step 3: Cross multiply
    122,705.89x = 169,329.79 × 68,993.98
  4. Step 4: Simplify right side
    122,705.89x = 11,682,735,807.58
  5. Step 5: Solve for x
    x = 11,682,735,807.58/122,705.89
  6. Step 6: Final answer
    x = 95,209.25

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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.