Finding the Fourth Proportional to 120,478.05, 180,725.93 and 31,730.91
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Solution
The fourth proportional to 120,478.05, 180,725.93 and 31,730.91 is: 47,598.69
Step by Step Solution
- Step 1: Write the proportion equation
120,478.05 : 180,725.93 = 31,730.91 : x - Step 2: Convert to fraction form
120,478.05/180,725.93 = 31,730.91/x - Step 3: Cross multiply
120,478.05x = 180,725.93 × 31,730.91 - Step 4: Simplify right side
120,478.05x = 5,734,597,680.60 - Step 5: Solve for x
x = 5,734,597,680.60/120,478.05 - Step 6: Final answer
x = 47,598.69
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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.