Finding the Fourth Proportional to 212,532.12, 318,879.18 and 79,471.80
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Solution
The fourth proportional to 212,532.12, 318,879.18 and 79,471.80 is: 119,237.99
Step by Step Solution
- Step 1: Write the proportion equation
212,532.12 : 318,879.18 = 79,471.80 : x - Step 2: Convert to fraction form
212,532.12/318,879.18 = 79,471.80/x - Step 3: Cross multiply
212,532.12x = 318,879.18 × 79,471.80 - Step 4: Simplify right side
212,532.12x = 25,341,902,417.12 - Step 5: Solve for x
x = 25,341,902,417.12/212,532.12 - Step 6: Final answer
x = 119,237.99
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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.