Finding the Fourth Proportional to 138,331.80, 207,497.70 and 115,003.80
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Solution
The fourth proportional to 138,331.80, 207,497.70 and 115,003.80 is: 172,505.70
Step by Step Solution
- Step 1: Write the proportion equation
138,331.80 : 207,497.70 = 115,003.80 : x - Step 2: Convert to fraction form
138,331.80/207,497.70 = 115,003.80/x - Step 3: Cross multiply
138,331.80x = 207,497.70 × 115,003.80 - Step 4: Simplify right side
138,331.80x = 23,863,023,991.26 - Step 5: Solve for x
x = 23,863,023,991.26/138,331.80 - Step 6: Final answer
x = 172,505.70
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1.5x scale
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.