Finding the Fourth Proportional to 138,221.20, 207,331.80 and 68,237.20
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Solution
The fourth proportional to 138,221.20, 207,331.80 and 68,237.20 is: 102,355.80
Step by Step Solution
- Step 1: Write the proportion equation
138,221.20 : 207,331.80 = 68,237.20 : x - Step 2: Convert to fraction form
138,221.20/207,331.80 = 68,237.20/x - Step 3: Cross multiply
138,221.20x = 207,331.80 × 68,237.20 - Step 4: Simplify right side
138,221.20x = 14,147,741,502.96 - Step 5: Solve for x
x = 14,147,741,502.96/138,221.20 - Step 6: Final answer
x = 102,355.80
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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.