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Finding the Fourth Proportional to 122,052.31, 168,449.86 and 68,340.78

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Solution

The fourth proportional to 122,052.31, 168,449.86 and 68,340.78 is: 94,320.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,052.31 : 168,449.86 = 68,340.78 : x
  2. Step 2: Convert to fraction form
    122,052.31/168,449.86 = 68,340.78/x
  3. Step 3: Cross multiply
    122,052.31x = 168,449.86 × 68,340.78
  4. Step 4: Simplify right side
    122,052.31x = 11,511,994,823.29
  5. Step 5: Solve for x
    x = 11,511,994,823.29/122,052.31
  6. Step 6: Final answer
    x = 94,320.17

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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.