Finding the Fourth Proportional to 125,316.50, 172,920.78 and 71,604.99
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Solution
The fourth proportional to 125,316.50, 172,920.78 and 71,604.99 is: 98,805.75
Step by Step Solution
- Step 1: Write the proportion equation
125,316.50 : 172,920.78 = 71,604.99 : x - Step 2: Convert to fraction form
125,316.50/172,920.78 = 71,604.99/x - Step 3: Cross multiply
125,316.50x = 172,920.78 × 71,604.99 - Step 4: Simplify right side
125,316.50x = 12,381,990,722.69 - Step 5: Solve for x
x = 12,381,990,722.69/125,316.50 - Step 6: Final answer
x = 98,805.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.