Finding the Fourth Proportional to 138,137.28, 207,268.80 and 67,021.53
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Solution
The fourth proportional to 138,137.28, 207,268.80 and 67,021.53 is: 100,562.80
Step by Step Solution
- Step 1: Write the proportion equation
138,137.28 : 207,268.80 = 67,021.53 : x - Step 2: Convert to fraction form
138,137.28/207,268.80 = 67,021.53/x - Step 3: Cross multiply
138,137.28x = 207,268.80 × 67,021.53 - Step 4: Simplify right side
138,137.28x = 13,891,472,097.26 - Step 5: Solve for x
x = 13,891,472,097.26/138,137.28 - Step 6: Final answer
x = 100,562.80
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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.