Finding the Fourth Proportional to 192,412.80, 288,619.20 and 129,427.20
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Solution
The fourth proportional to 192,412.80, 288,619.20 and 129,427.20 is: 194,140.80
Step by Step Solution
- Step 1: Write the proportion equation
192,412.80 : 288,619.20 = 129,427.20 : x - Step 2: Convert to fraction form
192,412.80/288,619.20 = 129,427.20/x - Step 3: Cross multiply
192,412.80x = 288,619.20 × 129,427.20 - Step 4: Simplify right side
192,412.80x = 37,355,174,922.24 - Step 5: Solve for x
x = 37,355,174,922.24/192,412.80 - Step 6: Final answer
x = 194,140.80
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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.