Finding the Fourth Proportional to 206,857.20, 310,285.80 and 128,125.20
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Solution
The fourth proportional to 206,857.20, 310,285.80 and 128,125.20 is: 192,187.80
Step by Step Solution
- Step 1: Write the proportion equation
206,857.20 : 310,285.80 = 128,125.20 : x - Step 2: Convert to fraction form
206,857.20/310,285.80 = 128,125.20/x - Step 3: Cross multiply
206,857.20x = 310,285.80 × 128,125.20 - Step 4: Simplify right side
206,857.20x = 39,755,430,182.16 - Step 5: Solve for x
x = 39,755,430,182.16/206,857.20 - Step 6: Final answer
x = 192,187.80
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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.