Finding the Fourth Proportional to 77,323.20, 115,984.80 and 21,163.20
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Solution
The fourth proportional to 77,323.20, 115,984.80 and 21,163.20 is: 31,744.80
Step by Step Solution
- Step 1: Write the proportion equation
77,323.20 : 115,984.80 = 21,163.20 : x - Step 2: Convert to fraction form
77,323.20/115,984.80 = 21,163.20/x - Step 3: Cross multiply
77,323.20x = 115,984.80 × 21,163.20 - Step 4: Simplify right side
77,323.20x = 2,454,609,519.36 - Step 5: Solve for x
x = 2,454,609,519.36/77,323.20 - Step 6: Final answer
x = 31,744.80
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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.