Finding the Fourth Proportional to 77,239.80, 115,859.70 and 68,929.20
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Solution
The fourth proportional to 77,239.80, 115,859.70 and 68,929.20 is: 103,393.80
Step by Step Solution
- Step 1: Write the proportion equation
77,239.80 : 115,859.70 = 68,929.20 : x - Step 2: Convert to fraction form
77,239.80/115,859.70 = 68,929.20/x - Step 3: Cross multiply
77,239.80x = 115,859.70 × 68,929.20 - Step 4: Simplify right side
77,239.80x = 7,986,116,433.24 - Step 5: Solve for x
x = 7,986,116,433.24/77,239.80 - Step 6: Final answer
x = 103,393.80
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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.