Finding the Fourth Proportional to 138,479.19, 191,101.37 and 74,816.97
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Solution
The fourth proportional to 138,479.19, 191,101.37 and 74,816.97 is: 103,247.47
Step by Step Solution
- Step 1: Write the proportion equation
138,479.19 : 191,101.37 = 74,816.97 : x - Step 2: Convert to fraction form
138,479.19/191,101.37 = 74,816.97/x - Step 3: Cross multiply
138,479.19x = 191,101.37 × 74,816.97 - Step 4: Simplify right side
138,479.19x = 14,297,625,466.25 - Step 5: Solve for x
x = 14,297,625,466.25/138,479.19 - Step 6: Final answer
x = 103,247.47
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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.