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Finding the Fourth Proportional to 90,651, 135,879.30 and 43,800.60

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Solution

The fourth proportional to 90,651, 135,879.30 and 43,800.60 is: 65,653.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,651 : 135,879.30 = 43,800.60 : x
  2. Step 2: Convert to fraction form
    90,651/135,879.30 = 43,800.60/x
  3. Step 3: Cross multiply
    90,651x = 135,879.30 × 43,800.60
  4. Step 4: Simplify right side
    90,651x = 5,951,594,867.58
  5. Step 5: Solve for x
    x = 5,951,594,867.58/90,651
  6. Step 6: Final answer
    x = 65,653.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.