Finding the Fourth Proportional to 91,130.20, 136,695.30 and 84,131.80
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Solution
The fourth proportional to 91,130.20, 136,695.30 and 84,131.80 is: 126,197.70
Step by Step Solution
- Step 1: Write the proportion equation
91,130.20 : 136,695.30 = 84,131.80 : x - Step 2: Convert to fraction form
91,130.20/136,695.30 = 84,131.80/x - Step 3: Cross multiply
91,130.20x = 136,695.30 × 84,131.80 - Step 4: Simplify right side
91,130.20x = 11,500,421,640.54 - Step 5: Solve for x
x = 11,500,421,640.54/91,130.20 - Step 6: Final answer
x = 126,197.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.