Finding the Fourth Proportional to 100,102.21, 138,141.02 and 54,780.19
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Solution
The fourth proportional to 100,102.21, 138,141.02 and 54,780.19 is: 75,596.65
Step by Step Solution
- Step 1: Write the proportion equation
100,102.21 : 138,141.02 = 54,780.19 : x - Step 2: Convert to fraction form
100,102.21/138,141.02 = 54,780.19/x - Step 3: Cross multiply
100,102.21x = 138,141.02 × 54,780.19 - Step 4: Simplify right side
100,102.21x = 7,567,391,113.99 - Step 5: Solve for x
x = 7,567,391,113.99/100,102.21 - Step 6: Final answer
x = 75,596.65
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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.