Finding the Fourth Proportional to 129,171.28, 178,343.35 and 115,516.96
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Solution
The fourth proportional to 129,171.28, 178,343.35 and 115,516.96 is: 159,491.19
Step by Step Solution
- Step 1: Write the proportion equation
129,171.28 : 178,343.35 = 115,516.96 : x - Step 2: Convert to fraction form
129,171.28/178,343.35 = 115,516.96/x - Step 3: Cross multiply
129,171.28x = 178,343.35 × 115,516.96 - Step 4: Simplify right side
129,171.28x = 20,601,681,628.22 - Step 5: Solve for x
x = 20,601,681,628.22/129,171.28 - Step 6: Final answer
x = 159,491.19
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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.