Finding the Fourth Proportional to 84,072.96, 126,112.08 and 31,472.40
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Solution
The fourth proportional to 84,072.96, 126,112.08 and 31,472.40 is: 47,209.59
Step by Step Solution
- Step 1: Write the proportion equation
84,072.96 : 126,112.08 = 31,472.40 : x - Step 2: Convert to fraction form
84,072.96/126,112.08 = 31,472.40/x - Step 3: Cross multiply
84,072.96x = 126,112.08 × 31,472.40 - Step 4: Simplify right side
84,072.96x = 3,969,049,826.59 - Step 5: Solve for x
x = 3,969,049,826.59/84,072.96 - Step 6: Final answer
x = 47,209.59
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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.