Finding the Fourth Proportional to 138,321.40, 207,482.10 and 136,247.80
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Solution
The fourth proportional to 138,321.40, 207,482.10 and 136,247.80 is: 204,371.70
Step by Step Solution
- Step 1: Write the proportion equation
138,321.40 : 207,482.10 = 136,247.80 : x - Step 2: Convert to fraction form
138,321.40/207,482.10 = 136,247.80/x - Step 3: Cross multiply
138,321.40x = 207,482.10 × 136,247.80 - Step 4: Simplify right side
138,321.40x = 28,268,979,664.38 - Step 5: Solve for x
x = 28,268,979,664.38/138,321.40 - Step 6: Final answer
x = 204,371.70
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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.