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Finding the Fourth Proportional to 122,005, 168,366.86 and 68,290

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Solution

The fourth proportional to 122,005, 168,366.86 and 68,290 is: 94,240.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,005 : 168,366.86 = 68,290 : x
  2. Step 2: Convert to fraction form
    122,005/168,366.86 = 68,290/x
  3. Step 3: Cross multiply
    122,005x = 168,366.86 × 68,290
  4. Step 4: Simplify right side
    122,005x = 11,497,772,869.40
  5. Step 5: Solve for x
    x = 11,497,772,869.40/122,005
  6. Step 6: Final answer
    x = 94,240.18

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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.