Finding the Fourth Proportional to 138,111.24, 207,157.08 and 78,760.92
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Solution
The fourth proportional to 138,111.24, 207,157.08 and 78,760.92 is: 118,135.80
Step by Step Solution
- Step 1: Write the proportion equation
138,111.24 : 207,157.08 = 78,760.92 : x - Step 2: Convert to fraction form
138,111.24/207,157.08 = 78,760.92/x - Step 3: Cross multiply
138,111.24x = 207,157.08 × 78,760.92 - Step 4: Simplify right side
138,111.24x = 16,315,882,205.31 - Step 5: Solve for x
x = 16,315,882,205.31/138,111.24 - Step 6: Final answer
x = 118,135.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.