Finding the Fourth Proportional to 128,297.70, 192,446.55 and 75,809.70
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Solution
The fourth proportional to 128,297.70, 192,446.55 and 75,809.70 is: 113,714.55
Step by Step Solution
- Step 1: Write the proportion equation
128,297.70 : 192,446.55 = 75,809.70 : x - Step 2: Convert to fraction form
128,297.70/192,446.55 = 75,809.70/x - Step 3: Cross multiply
128,297.70x = 192,446.55 × 75,809.70 - Step 4: Simplify right side
128,297.70x = 14,589,315,221.54 - Step 5: Solve for x
x = 14,589,315,221.54/128,297.70 - Step 6: Final answer
x = 113,714.55
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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.