Finding the Fourth Proportional to 212,221.63, 292,907.45 and 121,638.31
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Solution
The fourth proportional to 212,221.63, 292,907.45 and 121,638.31 is: 167,884.71
Step by Step Solution
- Step 1: Write the proportion equation
212,221.63 : 292,907.45 = 121,638.31 : x - Step 2: Convert to fraction form
212,221.63/292,907.45 = 121,638.31/x - Step 3: Cross multiply
212,221.63x = 292,907.45 × 121,638.31 - Step 4: Simplify right side
212,221.63x = 35,628,765,131.68 - Step 5: Solve for x
x = 35,628,765,131.68/212,221.63 - Step 6: Final answer
x = 167,884.71
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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.