Finding the Fourth Proportional to 215,615.81, 297,549.92 and 120,128.76
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Solution
The fourth proportional to 215,615.81, 297,549.92 and 120,128.76 is: 165,777.75
Step by Step Solution
- Step 1: Write the proportion equation
215,615.81 : 297,549.92 = 120,128.76 : x - Step 2: Convert to fraction form
215,615.81/297,549.92 = 120,128.76/x - Step 3: Cross multiply
215,615.81x = 297,549.92 × 120,128.76 - Step 4: Simplify right side
215,615.81x = 35,744,303,228.02 - Step 5: Solve for x
x = 35,744,303,228.02/215,615.81 - Step 6: Final answer
x = 165,777.75
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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.