Finding the Fourth Proportional to 100,532.21, 138,649.62 and 71,798.67
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Solution
The fourth proportional to 100,532.21, 138,649.62 and 71,798.67 is: 99,021.59
Step by Step Solution
- Step 1: Write the proportion equation
100,532.21 : 138,649.62 = 71,798.67 : x - Step 2: Convert to fraction form
100,532.21/138,649.62 = 71,798.67/x - Step 3: Cross multiply
100,532.21x = 138,649.62 × 71,798.67 - Step 4: Simplify right side
100,532.21x = 9,954,858,581.25 - Step 5: Solve for x
x = 9,954,858,581.25/100,532.21 - Step 6: Final answer
x = 99,021.59
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.