Finding the Fourth Proportional to 135,428.09, 186,891.30 and 74,997.43
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Solution
The fourth proportional to 135,428.09, 186,891.30 and 74,997.43 is: 103,496.75
Step by Step Solution
- Step 1: Write the proportion equation
135,428.09 : 186,891.30 = 74,997.43 : x - Step 2: Convert to fraction form
135,428.09/186,891.30 = 74,997.43/x - Step 3: Cross multiply
135,428.09x = 186,891.30 × 74,997.43 - Step 4: Simplify right side
135,428.09x = 14,016,366,722.13 - Step 5: Solve for x
x = 14,016,366,722.13/135,428.09 - Step 6: Final answer
x = 103,496.75
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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.