Finding the Fourth Proportional to 79,678.18, 119,517.36 and 20,513.98
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Solution
The fourth proportional to 79,678.18, 119,517.36 and 20,513.98 is: 30,770.99
Step by Step Solution
- Step 1: Write the proportion equation
79,678.18 : 119,517.36 = 20,513.98 : x - Step 2: Convert to fraction form
79,678.18/119,517.36 = 20,513.98/x - Step 3: Cross multiply
79,678.18x = 119,517.36 × 20,513.98 - Step 4: Simplify right side
79,678.18x = 2,451,776,732.69 - Step 5: Solve for x
x = 2,451,776,732.69/79,678.18 - Step 6: Final answer
x = 30,770.99
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1.5x scale
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.