Finding the Fourth Proportional to 138,879.63, 191,654.91 and 75,217.95
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Solution
The fourth proportional to 138,879.63, 191,654.91 and 75,217.95 is: 103,801.32
Step by Step Solution
- Step 1: Write the proportion equation
138,879.63 : 191,654.91 = 75,217.95 : x - Step 2: Convert to fraction form
138,879.63/191,654.91 = 75,217.95/x - Step 3: Cross multiply
138,879.63x = 191,654.91 × 75,217.95 - Step 4: Simplify right side
138,879.63x = 14,415,889,437.63 - Step 5: Solve for x
x = 14,415,889,437.63/138,879.63 - Step 6: Final answer
x = 103,801.32
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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.