Finding the Fourth Proportional to 206,839.70, 310,259.55 and 128,107.70
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Solution
The fourth proportional to 206,839.70, 310,259.55 and 128,107.70 is: 192,161.55
Step by Step Solution
- Step 1: Write the proportion equation
206,839.70 : 310,259.55 = 128,107.70 : x - Step 2: Convert to fraction form
206,839.70/310,259.55 = 128,107.70/x - Step 3: Cross multiply
206,839.70x = 310,259.55 × 128,107.70 - Step 4: Simplify right side
206,839.70x = 39,746,637,353.54 - Step 5: Solve for x
x = 39,746,637,353.54/206,839.70 - Step 6: Final answer
x = 192,161.55
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1.5x scale
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.