Finding the Fourth Proportional to 121,749.62, 167,965.35 and 80,933.49
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Solution
The fourth proportional to 121,749.62, 167,965.35 and 80,933.49 is: 111,655.56
Step by Step Solution
- Step 1: Write the proportion equation
121,749.62 : 167,965.35 = 80,933.49 : x - Step 2: Convert to fraction form
121,749.62/167,965.35 = 80,933.49/x - Step 3: Cross multiply
121,749.62x = 167,965.35 × 80,933.49 - Step 4: Simplify right side
121,749.62x = 13,594,021,881.54 - Step 5: Solve for x
x = 13,594,021,881.54/121,749.62 - Step 6: Final answer
x = 111,655.56
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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.