Finding the Fourth Proportional to 100,407.42, 138,546.81 and 57,957.75
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Solution
The fourth proportional to 100,407.42, 138,546.81 and 57,957.75 is: 79,972.79
Step by Step Solution
- Step 1: Write the proportion equation
100,407.42 : 138,546.81 = 57,957.75 : x - Step 2: Convert to fraction form
100,407.42/138,546.81 = 57,957.75/x - Step 3: Cross multiply
100,407.42x = 138,546.81 × 57,957.75 - Step 4: Simplify right side
100,407.42x = 8,029,861,377.28 - Step 5: Solve for x
x = 8,029,861,377.28/100,407.42 - Step 6: Final answer
x = 79,972.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.