Finding the Fourth Proportional to 128,364.38, 177,121.37 and 74,651.66
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Solution
The fourth proportional to 128,364.38, 177,121.37 and 74,651.66 is: 103,006.80
Step by Step Solution
- Step 1: Write the proportion equation
128,364.38 : 177,121.37 = 74,651.66 : x - Step 2: Convert to fraction form
128,364.38/177,121.37 = 74,651.66/x - Step 3: Cross multiply
128,364.38x = 177,121.37 × 74,651.66 - Step 4: Simplify right side
128,364.38x = 13,222,403,033.11 - Step 5: Solve for x
x = 13,222,403,033.11/128,364.38 - Step 6: Final answer
x = 103,006.80
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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.