Finding the Fourth Proportional to 129,474.06, 178,729.50 and 87,057.18
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Solution
The fourth proportional to 129,474.06, 178,729.50 and 87,057.18 is: 120,176.09
Step by Step Solution
- Step 1: Write the proportion equation
129,474.06 : 178,729.50 = 87,057.18 : x - Step 2: Convert to fraction form
129,474.06/178,729.50 = 87,057.18/x - Step 3: Cross multiply
129,474.06x = 178,729.50 × 87,057.18 - Step 4: Simplify right side
129,474.06x = 15,559,686,252.81 - Step 5: Solve for x
x = 15,559,686,252.81/129,474.06 - Step 6: Final answer
x = 120,176.09
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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.