Finding the Fourth Proportional to 81,315.80, 121,973.70 and 41,859.80
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Solution
The fourth proportional to 81,315.80, 121,973.70 and 41,859.80 is: 62,789.70
Step by Step Solution
- Step 1: Write the proportion equation
81,315.80 : 121,973.70 = 41,859.80 : x - Step 2: Convert to fraction form
81,315.80/121,973.70 = 41,859.80/x - Step 3: Cross multiply
81,315.80x = 121,973.70 × 41,859.80 - Step 4: Simplify right side
81,315.80x = 5,105,794,687.26 - Step 5: Solve for x
x = 5,105,794,687.26/81,315.80 - Step 6: Final answer
x = 62,789.70
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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.