Finding the Fourth Proportional to 258,142.14, 386,979.93 and 91,891.26
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Solution
The fourth proportional to 258,142.14, 386,979.93 and 91,891.26 is: 137,753.85
Step by Step Solution
- Step 1: Write the proportion equation
258,142.14 : 386,979.93 = 91,891.26 : x - Step 2: Convert to fraction form
258,142.14/386,979.93 = 91,891.26/x - Step 3: Cross multiply
258,142.14x = 386,979.93 × 91,891.26 - Step 4: Simplify right side
258,142.14x = 35,560,073,362.41 - Step 5: Solve for x
x = 35,560,073,362.41/258,142.14 - Step 6: Final answer
x = 137,753.85
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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.