Finding the Fourth Proportional to 100,639.01, 138,882.11 and 55,321.62
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Solution
The fourth proportional to 100,639.01, 138,882.11 and 55,321.62 is: 76,343.99
Step by Step Solution
- Step 1: Write the proportion equation
100,639.01 : 138,882.11 = 55,321.62 : x - Step 2: Convert to fraction form
100,639.01/138,882.11 = 55,321.62/x - Step 3: Cross multiply
100,639.01x = 138,882.11 × 55,321.62 - Step 4: Simplify right side
100,639.01x = 7,683,183,037.61 - Step 5: Solve for x
x = 7,683,183,037.61/100,639.01 - Step 6: Final answer
x = 76,343.99
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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.