Finding the Fourth Proportional to 122,757.08, 169,406.52 and 72,456.08
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Solution
The fourth proportional to 122,757.08, 169,406.52 and 72,456.08 is: 99,990.42
Step by Step Solution
- Step 1: Write the proportion equation
122,757.08 : 169,406.52 = 72,456.08 : x - Step 2: Convert to fraction form
122,757.08/169,406.52 = 72,456.08/x - Step 3: Cross multiply
122,757.08x = 169,406.52 × 72,456.08 - Step 4: Simplify right side
122,757.08x = 12,274,532,365.64 - Step 5: Solve for x
x = 12,274,532,365.64/122,757.08 - Step 6: Final answer
x = 99,990.42
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1.5x scale
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.