Finding the Fourth Proportional to 138,069.63, 206,934.84 and 71,471.79
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Solution
The fourth proportional to 138,069.63, 206,934.84 and 71,471.79 is: 107,119.89
Step by Step Solution
- Step 1: Write the proportion equation
138,069.63 : 206,934.84 = 71,471.79 : x - Step 2: Convert to fraction form
138,069.63/206,934.84 = 71,471.79/x - Step 3: Cross multiply
138,069.63x = 206,934.84 × 71,471.79 - Step 4: Simplify right side
138,069.63x = 14,790,003,428.16 - Step 5: Solve for x
x = 14,790,003,428.16/138,069.63 - Step 6: Final answer
x = 107,119.89
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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.