Finding the Fourth Proportional to 76,939.16, 115,371.68 and 36,378.88
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Solution
The fourth proportional to 76,939.16, 115,371.68 and 36,378.88 is: 54,550.79
Step by Step Solution
- Step 1: Write the proportion equation
76,939.16 : 115,371.68 = 36,378.88 : x - Step 2: Convert to fraction form
76,939.16/115,371.68 = 36,378.88/x - Step 3: Cross multiply
76,939.16x = 115,371.68 × 36,378.88 - Step 4: Simplify right side
76,939.16x = 4,197,092,031.79 - Step 5: Solve for x
x = 4,197,092,031.79/76,939.16 - Step 6: Final answer
x = 54,550.79
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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.