Finding the Fourth Proportional to 126,909.70, 190,364.55 and 115,245.70
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Solution
The fourth proportional to 126,909.70, 190,364.55 and 115,245.70 is: 172,868.55
Step by Step Solution
- Step 1: Write the proportion equation
126,909.70 : 190,364.55 = 115,245.70 : x - Step 2: Convert to fraction form
126,909.70/190,364.55 = 115,245.70/x - Step 3: Cross multiply
126,909.70x = 190,364.55 × 115,245.70 - Step 4: Simplify right side
126,909.70x = 21,938,695,819.94 - Step 5: Solve for x
x = 21,938,695,819.94/126,909.70 - Step 6: Final answer
x = 172,868.55
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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.