Finding the Fourth Proportional to 135,305.09, 186,716.43 and 74,878.28
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Solution
The fourth proportional to 135,305.09, 186,716.43 and 74,878.28 is: 103,329.49
Step by Step Solution
- Step 1: Write the proportion equation
135,305.09 : 186,716.43 = 74,878.28 : x - Step 2: Convert to fraction form
135,305.09/186,716.43 = 74,878.28/x - Step 3: Cross multiply
135,305.09x = 186,716.43 × 74,878.28 - Step 4: Simplify right side
135,305.09x = 13,981,005,873.73 - Step 5: Solve for x
x = 13,981,005,873.73/135,305.09 - Step 6: Final answer
x = 103,329.49
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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.