Finding the Fourth Proportional to 76,798.80, 115,198.20 and 57,115.80
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Solution
The fourth proportional to 76,798.80, 115,198.20 and 57,115.80 is: 85,673.70
Step by Step Solution
- Step 1: Write the proportion equation
76,798.80 : 115,198.20 = 57,115.80 : x - Step 2: Convert to fraction form
76,798.80/115,198.20 = 57,115.80/x - Step 3: Cross multiply
76,798.80x = 115,198.20 × 57,115.80 - Step 4: Simplify right side
76,798.80x = 6,579,637,351.56 - Step 5: Solve for x
x = 6,579,637,351.56/76,798.80 - Step 6: Final answer
x = 85,673.70
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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.