Finding the Fourth Proportional to 68,205.20, 102,322.20 and 20,816.40
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Solution
The fourth proportional to 68,205.20, 102,322.20 and 20,816.40 is: 31,228.99
Step by Step Solution
- Step 1: Write the proportion equation
68,205.20 : 102,322.20 = 20,816.40 : x - Step 2: Convert to fraction form
68,205.20/102,322.20 = 20,816.40/x - Step 3: Cross multiply
68,205.20x = 102,322.20 × 20,816.40 - Step 4: Simplify right side
68,205.20x = 2,129,979,844.08 - Step 5: Solve for x
x = 2,129,979,844.08/68,205.20 - Step 6: Final answer
x = 31,228.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.