Finding the Fourth Proportional to 126,305.40, 189,020.70 and 115,807.80
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Solution
The fourth proportional to 126,305.40, 189,020.70 and 115,807.80 is: 173,310.65
Step by Step Solution
- Step 1: Write the proportion equation
126,305.40 : 189,020.70 = 115,807.80 : x - Step 2: Convert to fraction form
126,305.40/189,020.70 = 115,807.80/x - Step 3: Cross multiply
126,305.40x = 189,020.70 × 115,807.80 - Step 4: Simplify right side
126,305.40x = 21,890,071,421.46 - Step 5: Solve for x
x = 21,890,071,421.46/126,305.40 - Step 6: Final answer
x = 173,310.65
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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.