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Finding the Fourth Proportional to 117,288.38, 161,879.64 and 66,987.38

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Solution

The fourth proportional to 117,288.38, 161,879.64 and 66,987.38 is: 92,454.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,288.38 : 161,879.64 = 66,987.38 : x
  2. Step 2: Convert to fraction form
    117,288.38/161,879.64 = 66,987.38/x
  3. Step 3: Cross multiply
    117,288.38x = 161,879.64 × 66,987.38
  4. Step 4: Simplify right side
    117,288.38x = 10,843,892,958.94
  5. Step 5: Solve for x
    x = 10,843,892,958.94/117,288.38
  6. Step 6: Final answer
    x = 92,454.96

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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.