Finding the Fourth Proportional to 158,343.50, 218,505.69 and 86,721.99
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Solution
The fourth proportional to 158,343.50, 218,505.69 and 86,721.99 is: 119,671.78
Step by Step Solution
- Step 1: Write the proportion equation
158,343.50 : 218,505.69 = 86,721.99 : x - Step 2: Convert to fraction form
158,343.50/218,505.69 = 86,721.99/x - Step 3: Cross multiply
158,343.50x = 218,505.69 × 86,721.99 - Step 4: Simplify right side
158,343.50x = 18,949,248,263.12 - Step 5: Solve for x
x = 18,949,248,263.12/158,343.50 - Step 6: Final answer
x = 119,671.78
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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.