Finding the Fourth Proportional to 120,639.36, 166,474.80 and 72,864.48
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Solution
The fourth proportional to 120,639.36, 166,474.80 and 72,864.48 is: 100,548.44
Step by Step Solution
- Step 1: Write the proportion equation
120,639.36 : 166,474.80 = 72,864.48 : x - Step 2: Convert to fraction form
120,639.36/166,474.80 = 72,864.48/x - Step 3: Cross multiply
120,639.36x = 166,474.80 × 72,864.48 - Step 4: Simplify right side
120,639.36x = 12,130,099,735.10 - Step 5: Solve for x
x = 12,130,099,735.10/120,639.36 - Step 6: Final answer
x = 100,548.44
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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.