Finding the Fourth Proportional to 138,319.80, 207,479.70 and 126,072.60
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Solution
The fourth proportional to 138,319.80, 207,479.70 and 126,072.60 is: 189,108.90
Step by Step Solution
- Step 1: Write the proportion equation
138,319.80 : 207,479.70 = 126,072.60 : x - Step 2: Convert to fraction form
138,319.80/207,479.70 = 126,072.60/x - Step 3: Cross multiply
138,319.80x = 207,479.70 × 126,072.60 - Step 4: Simplify right side
138,319.80x = 26,157,505,226.22 - Step 5: Solve for x
x = 26,157,505,226.22/138,319.80 - Step 6: Final answer
x = 189,108.90
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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.