Finding the Fourth Proportional to 138,979.79, 208,474.68 and 39,148.70
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Solution
The fourth proportional to 138,979.79, 208,474.68 and 39,148.70 is: 58,724.45
Step by Step Solution
- Step 1: Write the proportion equation
138,979.79 : 208,474.68 = 39,148.70 : x - Step 2: Convert to fraction form
138,979.79/208,474.68 = 39,148.70/x - Step 3: Cross multiply
138,979.79x = 208,474.68 × 39,148.70 - Step 4: Simplify right side
138,979.79x = 8,161,511,662.54 - Step 5: Solve for x
x = 8,161,511,662.54/138,979.79 - Step 6: Final answer
x = 58,724.45
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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.