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Finding the Fourth Proportional to 117,257.36, 161,815.74 and 68,891.86

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Solution

The fourth proportional to 117,257.36, 161,815.74 and 68,891.86 is: 95,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,257.36 : 161,815.74 = 68,891.86 : x
  2. Step 2: Convert to fraction form
    117,257.36/161,815.74 = 68,891.86/x
  3. Step 3: Cross multiply
    117,257.36x = 161,815.74 × 68,891.86
  4. Step 4: Simplify right side
    117,257.36x = 11,147,786,496.80
  5. Step 5: Solve for x
    x = 11,147,786,496.80/117,257.36
  6. Step 6: Final answer
    x = 95,071.10

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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.