Finding the Fourth Proportional to 129,428.47, 193,880.26 and 66,967.75
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Solution
The fourth proportional to 129,428.47, 193,880.26 and 66,967.75 is: 100,315.83
Step by Step Solution
- Step 1: Write the proportion equation
129,428.47 : 193,880.26 = 66,967.75 : x - Step 2: Convert to fraction form
129,428.47/193,880.26 = 66,967.75/x - Step 3: Cross multiply
129,428.47x = 193,880.26 × 66,967.75 - Step 4: Simplify right side
129,428.47x = 12,983,724,781.62 - Step 5: Solve for x
x = 12,983,724,781.62/129,428.47 - Step 6: Final answer
x = 100,315.83
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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.