Finding the Fourth Proportional to 100,405.44, 138,561.12 and 57,967.68
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Solution
The fourth proportional to 100,405.44, 138,561.12 and 57,967.68 is: 79,996.33
Step by Step Solution
- Step 1: Write the proportion equation
100,405.44 : 138,561.12 = 57,967.68 : x - Step 2: Convert to fraction form
100,405.44/138,561.12 = 57,967.68/x - Step 3: Cross multiply
100,405.44x = 138,561.12 × 57,967.68 - Step 4: Simplify right side
100,405.44x = 8,032,066,664.60 - Step 5: Solve for x
x = 8,032,066,664.60/100,405.44 - Step 6: Final answer
x = 79,996.33
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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.