Finding the Fourth Proportional to 99,908.74, 137,872.45 and 54,585.75
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Solution
The fourth proportional to 99,908.74, 137,872.45 and 54,585.75 is: 75,327.45
Step by Step Solution
- Step 1: Write the proportion equation
99,908.74 : 137,872.45 = 54,585.75 : x - Step 2: Convert to fraction form
99,908.74/137,872.45 = 54,585.75/x - Step 3: Cross multiply
99,908.74x = 137,872.45 × 54,585.75 - Step 4: Simplify right side
99,908.74x = 7,525,871,087.59 - Step 5: Solve for x
x = 7,525,871,087.59/99,908.74 - Step 6: Final answer
x = 75,327.45
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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.