Finding the Fourth Proportional to 121,430.12, 167,619.73 and 91,302.93
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Solution
The fourth proportional to 121,430.12, 167,619.73 and 91,302.93 is: 126,032.75
Step by Step Solution
- Step 1: Write the proportion equation
121,430.12 : 167,619.73 = 91,302.93 : x - Step 2: Convert to fraction form
121,430.12/167,619.73 = 91,302.93/x - Step 3: Cross multiply
121,430.12x = 167,619.73 × 91,302.93 - Step 4: Simplify right side
121,430.12x = 15,304,172,474.81 - Step 5: Solve for x
x = 15,304,172,474.81/121,430.12 - Step 6: Final answer
x = 126,032.75
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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.