Finding the Fourth Proportional to 121,299.80, 181,949.70 and 68,155.70
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Solution
The fourth proportional to 121,299.80, 181,949.70 and 68,155.70 is: 102,233.55
Step by Step Solution
- Step 1: Write the proportion equation
121,299.80 : 181,949.70 = 68,155.70 : x - Step 2: Convert to fraction form
121,299.80/181,949.70 = 68,155.70/x - Step 3: Cross multiply
121,299.80x = 181,949.70 × 68,155.70 - Step 4: Simplify right side
121,299.80x = 12,400,909,168.29 - Step 5: Solve for x
x = 12,400,909,168.29/121,299.80 - Step 6: Final answer
x = 102,233.55
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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.