Finding the Fourth Proportional to 80,731.40, 121,117.26 and 79,391.96
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Solution
The fourth proportional to 80,731.40, 121,117.26 and 79,391.96 is: 119,107.77
Step by Step Solution
- Step 1: Write the proportion equation
80,731.40 : 121,117.26 = 79,391.96 : x - Step 2: Convert to fraction form
80,731.40/121,117.26 = 79,391.96/x - Step 3: Cross multiply
80,731.40x = 121,117.26 × 79,391.96 - Step 4: Simplify right side
80,731.40x = 9,615,736,661.23 - Step 5: Solve for x
x = 9,615,736,661.23/80,731.40 - Step 6: Final answer
x = 119,107.77
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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.