Finding the Fourth Proportional to 126,089.20, 188,874.60 and 86,690.80
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Solution
The fourth proportional to 126,089.20, 188,874.60 and 86,690.80 is: 129,857.99
Step by Step Solution
- Step 1: Write the proportion equation
126,089.20 : 188,874.60 = 86,690.80 : x - Step 2: Convert to fraction form
126,089.20/188,874.60 = 86,690.80/x - Step 3: Cross multiply
126,089.20x = 188,874.60 × 86,690.80 - Step 4: Simplify right side
126,089.20x = 16,373,690,173.68 - Step 5: Solve for x
x = 16,373,690,173.68/126,089.20 - Step 6: Final answer
x = 129,857.99
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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.