Finding the Fourth Proportional to 129,163.20, 193,744.80 and 84,926.40
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Solution
The fourth proportional to 129,163.20, 193,744.80 and 84,926.40 is: 127,389.60
Step by Step Solution
- Step 1: Write the proportion equation
129,163.20 : 193,744.80 = 84,926.40 : x - Step 2: Convert to fraction form
129,163.20/193,744.80 = 84,926.40/x - Step 3: Cross multiply
129,163.20x = 193,744.80 × 84,926.40 - Step 4: Simplify right side
129,163.20x = 16,454,048,382.72 - Step 5: Solve for x
x = 16,454,048,382.72/129,163.20 - Step 6: Final answer
x = 127,389.60
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1.5x scale
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.