Finding the Fourth Proportional to 157,631.19, 217,531.67 and 86,012.70
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Solution
The fourth proportional to 157,631.19, 217,531.67 and 86,012.70 is: 118,697.87
Step by Step Solution
- Step 1: Write the proportion equation
157,631.19 : 217,531.67 = 86,012.70 : x - Step 2: Convert to fraction form
157,631.19/217,531.67 = 86,012.70/x - Step 3: Cross multiply
157,631.19x = 217,531.67 × 86,012.70 - Step 4: Simplify right side
157,631.19x = 18,710,485,842.15 - Step 5: Solve for x
x = 18,710,485,842.15/157,631.19 - Step 6: Final answer
x = 118,697.87
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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.