Finding the Fourth Proportional to 121,203.20, 181,804.80 and 85,773.80
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Solution
The fourth proportional to 121,203.20, 181,804.80 and 85,773.80 is: 128,660.70
Step by Step Solution
- Step 1: Write the proportion equation
121,203.20 : 181,804.80 = 85,773.80 : x - Step 2: Convert to fraction form
121,203.20/181,804.80 = 85,773.80/x - Step 3: Cross multiply
121,203.20x = 181,804.80 × 85,773.80 - Step 4: Simplify right side
121,203.20x = 15,594,088,554.24 - Step 5: Solve for x
x = 15,594,088,554.24/121,203.20 - Step 6: Final answer
x = 128,660.70
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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.