Finding the Fourth Proportional to 212,703.84, 318,635.42 and 128,214.54
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Solution
The fourth proportional to 212,703.84, 318,635.42 and 128,214.54 is: 192,068.43
Step by Step Solution
- Step 1: Write the proportion equation
212,703.84 : 318,635.42 = 128,214.54 : x - Step 2: Convert to fraction form
212,703.84/318,635.42 = 128,214.54/x - Step 3: Cross multiply
212,703.84x = 318,635.42 × 128,214.54 - Step 4: Simplify right side
212,703.84x = 40,853,693,161.93 - Step 5: Solve for x
x = 40,853,693,161.93/212,703.84 - Step 6: Final answer
x = 192,068.43
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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.