Finding the Fourth Proportional to 126,389.94, 189,609.77 and 42,148.99
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Solution
The fourth proportional to 126,389.94, 189,609.77 and 42,148.99 is: 63,231.78
Step by Step Solution
- Step 1: Write the proportion equation
126,389.94 : 189,609.77 = 42,148.99 : x - Step 2: Convert to fraction form
126,389.94/189,609.77 = 42,148.99/x - Step 3: Cross multiply
126,389.94x = 189,609.77 × 42,148.99 - Step 4: Simplify right side
126,389.94x = 7,991,860,299.63 - Step 5: Solve for x
x = 7,991,860,299.63/126,389.94 - Step 6: Final answer
x = 63,231.78
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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.