Finding the Fourth Proportional to 215,638.20, 323,457.30 and 121,159.80
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Solution
The fourth proportional to 215,638.20, 323,457.30 and 121,159.80 is: 181,739.70
Step by Step Solution
- Step 1: Write the proportion equation
215,638.20 : 323,457.30 = 121,159.80 : x - Step 2: Convert to fraction form
215,638.20/323,457.30 = 121,159.80/x - Step 3: Cross multiply
215,638.20x = 323,457.30 × 121,159.80 - Step 4: Simplify right side
215,638.20x = 39,190,021,776.54 - Step 5: Solve for x
x = 39,190,021,776.54/215,638.20 - Step 6: Final answer
x = 181,739.70
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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.