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Finding the Fourth Proportional to 122,103.66, 168,511.41 and 68,387.70

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Solution

The fourth proportional to 122,103.66, 168,511.41 and 68,387.70 is: 94,379.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,103.66 : 168,511.41 = 68,387.70 : x
  2. Step 2: Convert to fraction form
    122,103.66/168,511.41 = 68,387.70/x
  3. Step 3: Cross multiply
    122,103.66x = 168,511.41 × 68,387.70
  4. Step 4: Simplify right side
    122,103.66x = 11,524,107,753.66
  5. Step 5: Solve for x
    x = 11,524,107,753.66/122,103.66
  6. Step 6: Final answer
    x = 94,379.71

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1.5x scale

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.