Finding the Fourth Proportional to 212,123.70, 318,163.68 and 71,878.68
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Solution
The fourth proportional to 212,123.70, 318,163.68 and 71,878.68 is: 107,810.61
Step by Step Solution
- Step 1: Write the proportion equation
212,123.70 : 318,163.68 = 71,878.68 : x - Step 2: Convert to fraction form
212,123.70/318,163.68 = 71,878.68/x - Step 3: Cross multiply
212,123.70x = 318,163.68 × 71,878.68 - Step 4: Simplify right side
212,123.70x = 22,869,185,342.34 - Step 5: Solve for x
x = 22,869,185,342.34/212,123.70 - Step 6: Final answer
x = 107,810.61
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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.