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Finding the Fourth Proportional to 66,736.20, 100,105.55 and 31,187.77

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Solution

The fourth proportional to 66,736.20, 100,105.55 and 31,187.77 is: 46,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,736.20 : 100,105.55 = 31,187.77 : x
  2. Step 2: Convert to fraction form
    66,736.20/100,105.55 = 31,187.77/x
  3. Step 3: Cross multiply
    66,736.20x = 100,105.55 × 31,187.77
  4. Step 4: Simplify right side
    66,736.20x = 3,122,068,755.31
  5. Step 5: Solve for x
    x = 3,122,068,755.31/66,736.20
  6. Step 6: Final answer
    x = 46,782.23

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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.