Finding the Fourth Proportional to 129,478.29, 194,161.74 and 45,213.18
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Solution
The fourth proportional to 129,478.29, 194,161.74 and 45,213.18 is: 67,800.32
Step by Step Solution
- Step 1: Write the proportion equation
129,478.29 : 194,161.74 = 45,213.18 : x - Step 2: Convert to fraction form
129,478.29/194,161.74 = 45,213.18/x - Step 3: Cross multiply
129,478.29x = 194,161.74 × 45,213.18 - Step 4: Simplify right side
129,478.29x = 8,778,669,699.73 - Step 5: Solve for x
x = 8,778,669,699.73/129,478.29 - Step 6: Final answer
x = 67,800.32
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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.