Finding the Fourth Proportional to 128,691.39, 192,971.26 and 53,791.09
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Solution
The fourth proportional to 128,691.39, 192,971.26 and 53,791.09 is: 80,659.12
Step by Step Solution
- Step 1: Write the proportion equation
128,691.39 : 192,971.26 = 53,791.09 : x - Step 2: Convert to fraction form
128,691.39/192,971.26 = 53,791.09/x - Step 3: Cross multiply
128,691.39x = 192,971.26 × 53,791.09 - Step 4: Simplify right side
128,691.39x = 10,380,134,414.07 - Step 5: Solve for x
x = 10,380,134,414.07/128,691.39 - Step 6: Final answer
x = 80,659.12
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1.5x scale
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.