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Finding the Fourth Proportional to 122,465.93, 168,991.31 and 68,738.63

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Solution

The fourth proportional to 122,465.93, 168,991.31 and 68,738.63 is: 94,852.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,465.93 : 168,991.31 = 68,738.63 : x
  2. Step 2: Convert to fraction form
    122,465.93/168,991.31 = 68,738.63/x
  3. Step 3: Cross multiply
    122,465.93x = 168,991.31 × 68,738.63
  4. Step 4: Simplify right side
    122,465.93x = 11,616,230,458.20
  5. Step 5: Solve for x
    x = 11,616,230,458.20/122,465.93
  6. Step 6: Final answer
    x = 94,852.76

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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.