Finding the Fourth Proportional to 128,344.11, 177,043.77 and 74,623.19
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Solution
The fourth proportional to 128,344.11, 177,043.77 and 74,623.19 is: 102,938.65
Step by Step Solution
- Step 1: Write the proportion equation
128,344.11 : 177,043.77 = 74,623.19 : x - Step 2: Convert to fraction form
128,344.11/177,043.77 = 74,623.19/x - Step 3: Cross multiply
128,344.11x = 177,043.77 × 74,623.19 - Step 4: Simplify right side
128,344.11x = 13,211,570,001.81 - Step 5: Solve for x
x = 13,211,570,001.81/128,344.11 - Step 6: Final answer
x = 102,938.65
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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.