Finding the Fourth Proportional to 126,087.20, 188,871.60 and 86,688.80
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Solution
The fourth proportional to 126,087.20, 188,871.60 and 86,688.80 is: 129,854.99
Step by Step Solution
- Step 1: Write the proportion equation
126,087.20 : 188,871.60 = 86,688.80 : x - Step 2: Convert to fraction form
126,087.20/188,871.60 = 86,688.80/x - Step 3: Cross multiply
126,087.20x = 188,871.60 × 86,688.80 - Step 4: Simplify right side
126,087.20x = 16,373,052,358.08 - Step 5: Solve for x
x = 16,373,052,358.08/126,087.20 - Step 6: Final answer
x = 129,854.99
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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.