Finding the Fourth Proportional to 115,207.70, 172,811.55 and 91,879.70
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Solution
The fourth proportional to 115,207.70, 172,811.55 and 91,879.70 is: 137,819.55
Step by Step Solution
- Step 1: Write the proportion equation
115,207.70 : 172,811.55 = 91,879.70 : x - Step 2: Convert to fraction form
115,207.70/172,811.55 = 91,879.70/x - Step 3: Cross multiply
115,207.70x = 172,811.55 × 91,879.70 - Step 4: Simplify right side
115,207.70x = 15,877,873,370.54 - Step 5: Solve for x
x = 15,877,873,370.54/115,207.70 - Step 6: Final answer
x = 137,819.55
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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.