Finding the Fourth Proportional to 138,716.21, 191,428.36 and 75,054.02
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Solution
The fourth proportional to 138,716.21, 191,428.36 and 75,054.02 is: 103,574.53
Step by Step Solution
- Step 1: Write the proportion equation
138,716.21 : 191,428.36 = 75,054.02 : x - Step 2: Convert to fraction form
138,716.21/191,428.36 = 75,054.02/x - Step 3: Cross multiply
138,716.21x = 191,428.36 × 75,054.02 - Step 4: Simplify right side
138,716.21x = 14,367,466,815.23 - Step 5: Solve for x
x = 14,367,466,815.23/138,716.21 - Step 6: Final answer
x = 103,574.53
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.