Finding the Fourth Proportional to 139,983.84, 209,641.23 and 76,708.80
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Solution
The fourth proportional to 139,983.84, 209,641.23 and 76,708.80 is: 114,879.88
Step by Step Solution
- Step 1: Write the proportion equation
139,983.84 : 209,641.23 = 76,708.80 : x - Step 2: Convert to fraction form
139,983.84/209,641.23 = 76,708.80/x - Step 3: Cross multiply
139,983.84x = 209,641.23 × 76,708.80 - Step 4: Simplify right side
139,983.84x = 16,081,327,183.82 - Step 5: Solve for x
x = 16,081,327,183.82/139,983.84 - Step 6: Final answer
x = 114,879.88
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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.