Finding the Fourth Proportional to 138,571.62, 191,228.76 and 74,909.54
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Solution
The fourth proportional to 138,571.62, 191,228.76 and 74,909.54 is: 103,375.12
Step by Step Solution
- Step 1: Write the proportion equation
138,571.62 : 191,228.76 = 74,909.54 : x - Step 2: Convert to fraction form
138,571.62/191,228.76 = 74,909.54/x - Step 3: Cross multiply
138,571.62x = 191,228.76 × 74,909.54 - Step 4: Simplify right side
138,571.62x = 14,324,857,490.23 - Step 5: Solve for x
x = 14,324,857,490.23/138,571.62 - Step 6: Final answer
x = 103,375.12
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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.