Finding the Fourth Proportional to 71,691.36, 107,536.80 and 18,383.28
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Solution
The fourth proportional to 71,691.36, 107,536.80 and 18,383.28 is: 27,574.86
Step by Step Solution
- Step 1: Write the proportion equation
71,691.36 : 107,536.80 = 18,383.28 : x - Step 2: Convert to fraction form
71,691.36/107,536.80 = 18,383.28/x - Step 3: Cross multiply
71,691.36x = 107,536.80 × 18,383.28 - Step 4: Simplify right side
71,691.36x = 1,976,879,104.70 - Step 5: Solve for x
x = 1,976,879,104.70/71,691.36 - Step 6: Final answer
x = 27,574.86
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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.