Finding the Fourth Proportional to 100,480.91, 138,655.19 and 55,158.67
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Solution
The fourth proportional to 100,480.91, 138,655.19 and 55,158.67 is: 76,114.32
Step by Step Solution
- Step 1: Write the proportion equation
100,480.91 : 138,655.19 = 55,158.67 : x - Step 2: Convert to fraction form
100,480.91/138,655.19 = 55,158.67/x - Step 3: Cross multiply
100,480.91x = 138,655.19 × 55,158.67 - Step 4: Simplify right side
100,480.91x = 7,648,036,180.21 - Step 5: Solve for x
x = 7,648,036,180.21/100,480.91 - Step 6: Final answer
x = 76,114.32
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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.