Finding the Fourth Proportional to 129,170.28, 178,341.97 and 115,515.96
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Solution
The fourth proportional to 129,170.28, 178,341.97 and 115,515.96 is: 159,489.81
Step by Step Solution
- Step 1: Write the proportion equation
129,170.28 : 178,341.97 = 115,515.96 : x - Step 2: Convert to fraction form
129,170.28/178,341.97 = 115,515.96/x - Step 3: Cross multiply
129,170.28x = 178,341.97 × 115,515.96 - Step 4: Simplify right side
129,170.28x = 20,601,343,872.84 - Step 5: Solve for x
x = 20,601,343,872.84/129,170.28 - Step 6: Final answer
x = 159,489.81
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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.