Finding the Fourth Proportional to 157,122.24, 216,856.80 and 100,531.68
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Solution
The fourth proportional to 157,122.24, 216,856.80 and 100,531.68 is: 138,751.70
Step by Step Solution
- Step 1: Write the proportion equation
157,122.24 : 216,856.80 = 100,531.68 : x - Step 2: Convert to fraction form
157,122.24/216,856.80 = 100,531.68/x - Step 3: Cross multiply
157,122.24x = 216,856.80 × 100,531.68 - Step 4: Simplify right side
157,122.24x = 21,800,978,423.42 - Step 5: Solve for x
x = 21,800,978,423.42/157,122.24 - Step 6: Final answer
x = 138,751.70
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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.