Finding the Fourth Proportional to 130,687.16, 180,281.79 and 85,391.63
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Solution
The fourth proportional to 130,687.16, 180,281.79 and 85,391.63 is: 117,796.99
Step by Step Solution
- Step 1: Write the proportion equation
130,687.16 : 180,281.79 = 85,391.63 : x - Step 2: Convert to fraction form
130,687.16/180,281.79 = 85,391.63/x - Step 3: Cross multiply
130,687.16x = 180,281.79 × 85,391.63 - Step 4: Simplify right side
130,687.16x = 15,394,555,006.01 - Step 5: Solve for x
x = 15,394,555,006.01/130,687.16 - Step 6: Final answer
x = 117,796.99
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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.