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Finding the Fourth Proportional to 122,481.16, 169,018.48 and 68,765.20

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Solution

The fourth proportional to 122,481.16, 169,018.48 and 68,765.20 is: 94,892.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,481.16 : 169,018.48 = 68,765.20 : x
  2. Step 2: Convert to fraction form
    122,481.16/169,018.48 = 68,765.20/x
  3. Step 3: Cross multiply
    122,481.16x = 169,018.48 × 68,765.20
  4. Step 4: Simplify right side
    122,481.16x = 11,622,589,580.90
  5. Step 5: Solve for x
    x = 11,622,589,580.90/122,481.16
  6. Step 6: Final answer
    x = 94,892.88

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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.