Finding the Fourth Proportional to 129,328.60, 194,138.70 and 76,767.70
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Solution
The fourth proportional to 129,328.60, 194,138.70 and 76,767.70 is: 115,238.09
Step by Step Solution
- Step 1: Write the proportion equation
129,328.60 : 194,138.70 = 76,767.70 : x - Step 2: Convert to fraction form
129,328.60/194,138.70 = 76,767.70/x - Step 3: Cross multiply
129,328.60x = 194,138.70 × 76,767.70 - Step 4: Simplify right side
129,328.60x = 14,903,581,479.99 - Step 5: Solve for x
x = 14,903,581,479.99/129,328.60 - Step 6: Final answer
x = 115,238.09
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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.