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Finding the Fourth Proportional to 122,002, 168,362.72 and 68,287

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Solution

The fourth proportional to 122,002, 168,362.72 and 68,287 is: 94,236.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,002 : 168,362.72 = 68,287 : x
  2. Step 2: Convert to fraction form
    122,002/168,362.72 = 68,287/x
  3. Step 3: Cross multiply
    122,002x = 168,362.72 × 68,287
  4. Step 4: Simplify right side
    122,002x = 11,496,985,060.64
  5. Step 5: Solve for x
    x = 11,496,985,060.64/122,002
  6. Step 6: Final answer
    x = 94,236.04

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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.