Finding the Fourth Proportional to 158,381.21, 218,566.05 and 86,761.20
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Solution
The fourth proportional to 158,381.21, 218,566.05 and 86,761.20 is: 119,730.45
Step by Step Solution
- Step 1: Write the proportion equation
158,381.21 : 218,566.05 = 86,761.20 : x - Step 2: Convert to fraction form
158,381.21/218,566.05 = 86,761.20/x - Step 3: Cross multiply
158,381.21x = 218,566.05 × 86,761.20 - Step 4: Simplify right side
158,381.21x = 18,963,052,777.26 - Step 5: Solve for x
x = 18,963,052,777.26/158,381.21 - Step 6: Final answer
x = 119,730.45
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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.