Finding the Fourth Proportional to 128,613.20, 192,919.80 and 44,373.20
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Solution
The fourth proportional to 128,613.20, 192,919.80 and 44,373.20 is: 66,559.80
Step by Step Solution
- Step 1: Write the proportion equation
128,613.20 : 192,919.80 = 44,373.20 : x - Step 2: Convert to fraction form
128,613.20/192,919.80 = 44,373.20/x - Step 3: Cross multiply
128,613.20x = 192,919.80 × 44,373.20 - Step 4: Simplify right side
128,613.20x = 8,560,468,869.36 - Step 5: Solve for x
x = 8,560,468,869.36/128,613.20 - Step 6: Final answer
x = 66,559.80
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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.