Finding the Fourth Proportional to 128,135.40, 192,203.10 and 121,246.35
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Solution
The fourth proportional to 128,135.40, 192,203.10 and 121,246.35 is: 181,869.53
Step by Step Solution
- Step 1: Write the proportion equation
128,135.40 : 192,203.10 = 121,246.35 : x - Step 2: Convert to fraction form
128,135.40/192,203.10 = 121,246.35/x - Step 3: Cross multiply
128,135.40x = 192,203.10 × 121,246.35 - Step 4: Simplify right side
128,135.40x = 23,303,924,333.69 - Step 5: Solve for x
x = 23,303,924,333.69/128,135.40 - Step 6: Final answer
x = 181,869.53
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Similar ratio
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1.5x scale
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.