Finding the Fourth Proportional to 120,462.78, 166,242.96 and 72,706.80
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Solution
The fourth proportional to 120,462.78, 166,242.96 and 72,706.80 is: 100,337.99
Step by Step Solution
- Step 1: Write the proportion equation
120,462.78 : 166,242.96 = 72,706.80 : x - Step 2: Convert to fraction form
120,462.78/166,242.96 = 72,706.80/x - Step 3: Cross multiply
120,462.78x = 166,242.96 × 72,706.80 - Step 4: Simplify right side
120,462.78x = 12,086,993,644.13 - Step 5: Solve for x
x = 12,086,993,644.13/120,462.78 - Step 6: Final answer
x = 100,337.99
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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.