Finding the Fourth Proportional to 139,641.06, 192,708.36 and 75,982.80
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Solution
The fourth proportional to 139,641.06, 192,708.36 and 75,982.80 is: 104,858.28
Step by Step Solution
- Step 1: Write the proportion equation
139,641.06 : 192,708.36 = 75,982.80 : x - Step 2: Convert to fraction form
139,641.06/192,708.36 = 75,982.80/x - Step 3: Cross multiply
139,641.06x = 192,708.36 × 75,982.80 - Step 4: Simplify right side
139,641.06x = 14,642,520,776.21 - Step 5: Solve for x
x = 14,642,520,776.21/139,641.06 - Step 6: Final answer
x = 104,858.28
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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.