Finding the Fourth Proportional to 215,419.80, 323,129.70 and 122,107.80
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Solution
The fourth proportional to 215,419.80, 323,129.70 and 122,107.80 is: 183,161.70
Step by Step Solution
- Step 1: Write the proportion equation
215,419.80 : 323,129.70 = 122,107.80 : x - Step 2: Convert to fraction form
215,419.80/323,129.70 = 122,107.80/x - Step 3: Cross multiply
215,419.80x = 323,129.70 × 122,107.80 - Step 4: Simplify right side
215,419.80x = 39,456,656,781.66 - Step 5: Solve for x
x = 39,456,656,781.66/215,419.80 - Step 6: Final answer
x = 183,161.70
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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.