Finding the Fourth Proportional to 76,961.68, 115,479.04 and 53,305.60
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Solution
The fourth proportional to 76,961.68, 115,479.04 and 53,305.60 is: 79,983.69
Step by Step Solution
- Step 1: Write the proportion equation
76,961.68 : 115,479.04 = 53,305.60 : x - Step 2: Convert to fraction form
76,961.68/115,479.04 = 53,305.60/x - Step 3: Cross multiply
76,961.68x = 115,479.04 × 53,305.60 - Step 4: Simplify right side
76,961.68x = 6,155,679,514.62 - Step 5: Solve for x
x = 6,155,679,514.62/76,961.68 - Step 6: Final answer
x = 79,983.69
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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.