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Finding the Fourth Proportional to 122,636.94, 169,238.26 and 68,921.48

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Solution

The fourth proportional to 122,636.94, 169,238.26 and 68,921.48 is: 95,111.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,636.94 : 169,238.26 = 68,921.48 : x
  2. Step 2: Convert to fraction form
    122,636.94/169,238.26 = 68,921.48/x
  3. Step 3: Cross multiply
    122,636.94x = 169,238.26 × 68,921.48
  4. Step 4: Simplify right side
    122,636.94x = 11,664,151,861.07
  5. Step 5: Solve for x
    x = 11,664,151,861.07/122,636.94
  6. Step 6: Final answer
    x = 95,111.25

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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.