Finding the Fourth Proportional to 138,964.12, 191,745.21 and 77,711.44
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Solution
The fourth proportional to 138,964.12, 191,745.21 and 77,711.44 is: 107,227.65
Step by Step Solution
- Step 1: Write the proportion equation
138,964.12 : 191,745.21 = 77,711.44 : x - Step 2: Convert to fraction form
138,964.12/191,745.21 = 77,711.44/x - Step 3: Cross multiply
138,964.12x = 191,745.21 × 77,711.44 - Step 4: Simplify right side
138,964.12x = 14,900,796,382.20 - Step 5: Solve for x
x = 14,900,796,382.20/138,964.12 - Step 6: Final answer
x = 107,227.65
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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.