Finding the Fourth Proportional to 128,966.61, 193,420.96 and 54,171.21
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Solution
The fourth proportional to 128,966.61, 193,420.96 and 54,171.21 is: 81,244.65
Step by Step Solution
- Step 1: Write the proportion equation
128,966.61 : 193,420.96 = 54,171.21 : x - Step 2: Convert to fraction form
128,966.61/193,420.96 = 54,171.21/x - Step 3: Cross multiply
128,966.61x = 193,420.96 × 54,171.21 - Step 4: Simplify right side
128,966.61x = 10,477,847,307.13 - Step 5: Solve for x
x = 10,477,847,307.13/128,966.61 - Step 6: Final answer
x = 81,244.65
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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.