Finding the Fourth Proportional to 121,399.28, 167,471.47 and 81,122.95
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Solution
The fourth proportional to 121,399.28, 167,471.47 and 81,122.95 is: 111,909.89
Step by Step Solution
- Step 1: Write the proportion equation
121,399.28 : 167,471.47 = 81,122.95 : x - Step 2: Convert to fraction form
121,399.28/167,471.47 = 81,122.95/x - Step 3: Cross multiply
121,399.28x = 167,471.47 × 81,122.95 - Step 4: Simplify right side
121,399.28x = 13,585,779,687.24 - Step 5: Solve for x
x = 13,585,779,687.24/121,399.28 - Step 6: Final answer
x = 111,909.89
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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.