Finding the Fourth Proportional to 231,130.17, 318,953.53 and 129,156.47
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Solution
The fourth proportional to 231,130.17, 318,953.53 and 129,156.47 is: 178,232.52
Step by Step Solution
- Step 1: Write the proportion equation
231,130.17 : 318,953.53 = 129,156.47 : x - Step 2: Convert to fraction form
231,130.17/318,953.53 = 129,156.47/x - Step 3: Cross multiply
231,130.17x = 318,953.53 × 129,156.47 - Step 4: Simplify right side
231,130.17x = 41,194,912,826.22 - Step 5: Solve for x
x = 41,194,912,826.22/231,130.17 - Step 6: Final answer
x = 178,232.52
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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.