Finding the Fourth Proportional to 120,718.18, 166,646.87 and 72,343.09
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Solution
The fourth proportional to 120,718.18, 166,646.87 and 72,343.09 is: 99,866.89
Step by Step Solution
- Step 1: Write the proportion equation
120,718.18 : 166,646.87 = 72,343.09 : x - Step 2: Convert to fraction form
120,718.18/166,646.87 = 72,343.09/x - Step 3: Cross multiply
120,718.18x = 166,646.87 × 72,343.09 - Step 4: Simplify right side
120,718.18x = 12,055,749,514.63 - Step 5: Solve for x
x = 12,055,749,514.63/120,718.18 - Step 6: Final answer
x = 99,866.89
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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.