Finding the Fourth Proportional to 207,781.20, 311,876.60 and 102,718.80
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Solution
The fourth proportional to 207,781.20, 311,876.60 and 102,718.80 is: 154,179.45
Step by Step Solution
- Step 1: Write the proportion equation
207,781.20 : 311,876.60 = 102,718.80 : x - Step 2: Convert to fraction form
207,781.20/311,876.60 = 102,718.80/x - Step 3: Cross multiply
207,781.20x = 311,876.60 × 102,718.80 - Step 4: Simplify right side
207,781.20x = 32,035,590,100.08 - Step 5: Solve for x
x = 32,035,590,100.08/207,781.20 - Step 6: Final answer
x = 154,179.45
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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.