Finding the Fourth Proportional to 81,208.44, 121,786.74 and 25,791.48
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Solution
The fourth proportional to 81,208.44, 121,786.74 and 25,791.48 is: 38,678.99
Step by Step Solution
- Step 1: Write the proportion equation
81,208.44 : 121,786.74 = 25,791.48 : x - Step 2: Convert to fraction form
81,208.44/121,786.74 = 25,791.48/x - Step 3: Cross multiply
81,208.44x = 121,786.74 × 25,791.48 - Step 4: Simplify right side
81,208.44x = 3,141,060,268.98 - Step 5: Solve for x
x = 3,141,060,268.98/81,208.44 - Step 6: Final answer
x = 38,678.99
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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.