Finding the Fourth Proportional to 129,628.44, 178,905.78 and 73,045.08
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Solution
The fourth proportional to 129,628.44, 178,905.78 and 73,045.08 is: 100,812.65
Step by Step Solution
- Step 1: Write the proportion equation
129,628.44 : 178,905.78 = 73,045.08 : x - Step 2: Convert to fraction form
129,628.44/178,905.78 = 73,045.08/x - Step 3: Cross multiply
129,628.44x = 178,905.78 × 73,045.08 - Step 4: Simplify right side
129,628.44x = 13,068,187,012.56 - Step 5: Solve for x
x = 13,068,187,012.56/129,628.44 - Step 6: Final answer
x = 100,812.65
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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.