Finding the Fourth Proportional to 128,356.25, 192,452.36 and 61,663.68
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Solution
The fourth proportional to 128,356.25, 192,452.36 and 61,663.68 is: 92,456.12
Step by Step Solution
- Step 1: Write the proportion equation
128,356.25 : 192,452.36 = 61,663.68 : x - Step 2: Convert to fraction form
128,356.25/192,452.36 = 61,663.68/x - Step 3: Cross multiply
128,356.25x = 192,452.36 × 61,663.68 - Step 4: Simplify right side
128,356.25x = 11,867,320,433.97 - Step 5: Solve for x
x = 11,867,320,433.97/128,356.25 - Step 6: Final answer
x = 92,456.12
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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.