Finding the Fourth Proportional to 138,188.20, 207,270.35 and 84,138.92
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Solution
The fourth proportional to 138,188.20, 207,270.35 and 84,138.92 is: 126,201.11
Step by Step Solution
- Step 1: Write the proportion equation
138,188.20 : 207,270.35 = 84,138.92 : x - Step 2: Convert to fraction form
138,188.20/207,270.35 = 84,138.92/x - Step 3: Cross multiply
138,188.20x = 207,270.35 × 84,138.92 - Step 4: Simplify right side
138,188.20x = 17,439,503,810.02 - Step 5: Solve for x
x = 17,439,503,810.02/138,188.20 - Step 6: Final answer
x = 126,201.11
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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.