Finding the Fourth Proportional to 84,623.80, 126,935.70 and 76,847.80
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Solution
The fourth proportional to 84,623.80, 126,935.70 and 76,847.80 is: 115,271.70
Step by Step Solution
- Step 1: Write the proportion equation
84,623.80 : 126,935.70 = 76,847.80 : x - Step 2: Convert to fraction form
84,623.80/126,935.70 = 76,847.80/x - Step 3: Cross multiply
84,623.80x = 126,935.70 × 76,847.80 - Step 4: Simplify right side
84,623.80x = 9,754,729,286.46 - Step 5: Solve for x
x = 9,754,729,286.46/84,623.80 - Step 6: Final answer
x = 115,271.70
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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.