Finding the Fourth Proportional to 128,911.70, 193,367.55 and 93,919.70
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Solution
The fourth proportional to 128,911.70, 193,367.55 and 93,919.70 is: 140,879.55
Step by Step Solution
- Step 1: Write the proportion equation
128,911.70 : 193,367.55 = 93,919.70 : x - Step 2: Convert to fraction form
128,911.70/193,367.55 = 93,919.70/x - Step 3: Cross multiply
128,911.70x = 193,367.55 × 93,919.70 - Step 4: Simplify right side
128,911.70x = 18,161,022,285.74 - Step 5: Solve for x
x = 18,161,022,285.74/128,911.70 - Step 6: Final answer
x = 140,879.55
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1.5x scale
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.