Finding the Fourth Proportional to 149,129.24, 205,731.43 and 100,715.42
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Solution
The fourth proportional to 149,129.24, 205,731.43 and 100,715.42 is: 138,942.09
Step by Step Solution
- Step 1: Write the proportion equation
149,129.24 : 205,731.43 = 100,715.42 : x - Step 2: Convert to fraction form
149,129.24/205,731.43 = 100,715.42/x - Step 3: Cross multiply
149,129.24x = 205,731.43 × 100,715.42 - Step 4: Simplify right side
149,129.24x = 20,720,327,642.19 - Step 5: Solve for x
x = 20,720,327,642.19/149,129.24 - Step 6: Final answer
x = 138,942.09
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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.