Finding the Fourth Proportional to 128,232.40, 192,314.04 and 86,933.20
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Solution
The fourth proportional to 128,232.40, 192,314.04 and 86,933.20 is: 130,376.37
Step by Step Solution
- Step 1: Write the proportion equation
128,232.40 : 192,314.04 = 86,933.20 : x - Step 2: Convert to fraction form
128,232.40/192,314.04 = 86,933.20/x - Step 3: Cross multiply
128,232.40x = 192,314.04 × 86,933.20 - Step 4: Simplify right side
128,232.40x = 16,718,474,902.13 - Step 5: Solve for x
x = 16,718,474,902.13/128,232.40 - Step 6: Final answer
x = 130,376.37
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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.