Finding the Fourth Proportional to 129,576.30, 178,754.16 and 75,828.06
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Solution
The fourth proportional to 129,576.30, 178,754.16 and 75,828.06 is: 104,606.95
Step by Step Solution
- Step 1: Write the proportion equation
129,576.30 : 178,754.16 = 75,828.06 : x - Step 2: Convert to fraction form
129,576.30/178,754.16 = 75,828.06/x - Step 3: Cross multiply
129,576.30x = 178,754.16 × 75,828.06 - Step 4: Simplify right side
129,576.30x = 13,554,581,169.73 - Step 5: Solve for x
x = 13,554,581,169.73/129,576.30 - Step 6: Final answer
x = 104,606.95
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.