Finding the Fourth Proportional to 138,618.44, 191,293.42 and 74,956.28
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Solution
The fourth proportional to 138,618.44, 191,293.42 and 74,956.28 is: 103,439.65
Step by Step Solution
- Step 1: Write the proportion equation
138,618.44 : 191,293.42 = 74,956.28 : x - Step 2: Convert to fraction form
138,618.44/191,293.42 = 74,956.28/x - Step 3: Cross multiply
138,618.44x = 191,293.42 × 74,956.28 - Step 4: Simplify right side
138,618.44x = 14,338,643,151.68 - Step 5: Solve for x
x = 14,338,643,151.68/138,618.44 - Step 6: Final answer
x = 103,439.65
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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.