Finding the Fourth Proportional to 138,709.05, 191,419.16 and 75,046.99
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Solution
The fourth proportional to 138,709.05, 191,419.16 and 75,046.99 is: 103,565.21
Step by Step Solution
- Step 1: Write the proportion equation
138,709.05 : 191,419.16 = 75,046.99 : x - Step 2: Convert to fraction form
138,709.05/191,419.16 = 75,046.99/x - Step 3: Cross multiply
138,709.05x = 191,419.16 × 75,046.99 - Step 4: Simplify right side
138,709.05x = 14,365,431,786.33 - Step 5: Solve for x
x = 14,365,431,786.33/138,709.05 - Step 6: Final answer
x = 103,565.21
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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.