Finding the Fourth Proportional to 138,879.47, 208,328.97 and 68,739.95
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Solution
The fourth proportional to 138,879.47, 208,328.97 and 68,739.95 is: 103,114.75
Step by Step Solution
- Step 1: Write the proportion equation
138,879.47 : 208,328.97 = 68,739.95 : x - Step 2: Convert to fraction form
138,879.47/208,328.97 = 68,739.95/x - Step 3: Cross multiply
138,879.47x = 208,328.97 × 68,739.95 - Step 4: Simplify right side
138,879.47x = 14,320,521,939.71 - Step 5: Solve for x
x = 14,320,521,939.71/138,879.47 - Step 6: Final answer
x = 103,114.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.