Finding the Fourth Proportional to 212,871.42, 319,350.33 and 79,749.18
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Solution
The fourth proportional to 212,871.42, 319,350.33 and 79,749.18 is: 119,639.95
Step by Step Solution
- Step 1: Write the proportion equation
212,871.42 : 319,350.33 = 79,749.18 : x - Step 2: Convert to fraction form
212,871.42/319,350.33 = 79,749.18/x - Step 3: Cross multiply
212,871.42x = 319,350.33 × 79,749.18 - Step 4: Simplify right side
212,871.42x = 25,467,926,950.23 - Step 5: Solve for x
x = 25,467,926,950.23/212,871.42 - Step 6: Final answer
x = 119,639.95
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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.