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Finding the Fourth Proportional to 122,628.65, 169,226.66 and 68,912.51

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Solution

The fourth proportional to 122,628.65, 169,226.66 and 68,912.51 is: 95,098.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,628.65 : 169,226.66 = 68,912.51 : x
  2. Step 2: Convert to fraction form
    122,628.65/169,226.66 = 68,912.51/x
  3. Step 3: Cross multiply
    122,628.65x = 169,226.66 × 68,912.51
  4. Step 4: Simplify right side
    122,628.65x = 11,661,832,708.82
  5. Step 5: Solve for x
    x = 11,661,832,708.82/122,628.65
  6. Step 6: Final answer
    x = 95,098.77

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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.