Finding the Fourth Proportional to 206,865.20, 310,297.80 and 128,133.20
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Solution
The fourth proportional to 206,865.20, 310,297.80 and 128,133.20 is: 192,199.80
Step by Step Solution
- Step 1: Write the proportion equation
206,865.20 : 310,297.80 = 128,133.20 : x - Step 2: Convert to fraction form
206,865.20/310,297.80 = 128,133.20/x - Step 3: Cross multiply
206,865.20x = 310,297.80 × 128,133.20 - Step 4: Simplify right side
206,865.20x = 39,759,450,066.96 - Step 5: Solve for x
x = 39,759,450,066.96/206,865.20 - Step 6: Final answer
x = 192,199.80
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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.