Finding the Fourth Proportional to 128,670.23, 192,791.93 and 91,043.80
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Solution
The fourth proportional to 128,670.23, 192,791.93 and 91,043.80 is: 136,414.68
Step by Step Solution
- Step 1: Write the proportion equation
128,670.23 : 192,791.93 = 91,043.80 : x - Step 2: Convert to fraction form
128,670.23/192,791.93 = 91,043.80/x - Step 3: Cross multiply
128,670.23x = 192,791.93 × 91,043.80 - Step 4: Simplify right side
128,670.23x = 17,552,508,979.34 - Step 5: Solve for x
x = 17,552,508,979.34/128,670.23 - Step 6: Final answer
x = 136,414.68
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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.