Finding the Fourth Proportional to 221,715.09, 305,967.11 and 121,113.09
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Solution
The fourth proportional to 221,715.09, 305,967.11 and 121,113.09 is: 167,136.22
Step by Step Solution
- Step 1: Write the proportion equation
221,715.09 : 305,967.11 = 121,113.09 : x - Step 2: Convert to fraction form
221,715.09/305,967.11 = 121,113.09/x - Step 3: Cross multiply
221,715.09x = 305,967.11 × 121,113.09 - Step 4: Simplify right side
221,715.09x = 37,056,621,524.90 - Step 5: Solve for x
x = 37,056,621,524.90/221,715.09 - Step 6: Final answer
x = 167,136.22
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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.