Finding the Fourth Proportional to 80,639.19, 120,942.99 and 76,638.51
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Solution
The fourth proportional to 80,639.19, 120,942.99 and 76,638.51 is: 114,942.75
Step by Step Solution
- Step 1: Write the proportion equation
80,639.19 : 120,942.99 = 76,638.51 : x - Step 2: Convert to fraction form
80,639.19/120,942.99 = 76,638.51/x - Step 3: Cross multiply
80,639.19x = 120,942.99 × 76,638.51 - Step 4: Simplify right side
80,639.19x = 9,268,890,548.54 - Step 5: Solve for x
x = 9,268,890,548.54/80,639.19 - Step 6: Final answer
x = 114,942.75
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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.