Finding the Fourth Proportional to 121,922.82, 168,245.64 and 68,198.58
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Solution
The fourth proportional to 121,922.82, 168,245.64 and 68,198.58 is: 94,109.65
Step by Step Solution
- Step 1: Write the proportion equation
121,922.82 : 168,245.64 = 68,198.58 : x - Step 2: Convert to fraction form
121,922.82/168,245.64 = 68,198.58/x - Step 3: Cross multiply
121,922.82x = 168,245.64 × 68,198.58 - Step 4: Simplify right side
121,922.82x = 11,474,113,739.19 - Step 5: Solve for x
x = 11,474,113,739.19/121,922.82 - Step 6: Final answer
x = 94,109.65
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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.