Finding the Fourth Proportional to 129,077.80, 193,616.70 and 115,299.70
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Solution
The fourth proportional to 129,077.80, 193,616.70 and 115,299.70 is: 172,949.55
Step by Step Solution
- Step 1: Write the proportion equation
129,077.80 : 193,616.70 = 115,299.70 : x - Step 2: Convert to fraction form
129,077.80/193,616.70 = 115,299.70/x - Step 3: Cross multiply
129,077.80x = 193,616.70 × 115,299.70 - Step 4: Simplify right side
129,077.80x = 22,323,947,424.99 - Step 5: Solve for x
x = 22,323,947,424.99/129,077.80 - Step 6: Final answer
x = 172,949.55
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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.