Finding the Fourth Proportional to 139,879.31, 193,033.49 and 76,217.09
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Solution
The fourth proportional to 139,879.31, 193,033.49 and 76,217.09 is: 105,179.60
Step by Step Solution
- Step 1: Write the proportion equation
139,879.31 : 193,033.49 = 76,217.09 : x - Step 2: Convert to fraction form
139,879.31/193,033.49 = 76,217.09/x - Step 3: Cross multiply
139,879.31x = 193,033.49 × 76,217.09 - Step 4: Simplify right side
139,879.31x = 14,712,449,534.09 - Step 5: Solve for x
x = 14,712,449,534.09/139,879.31 - Step 6: Final answer
x = 105,179.60
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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.