Finding the Fourth Proportional to 129,010.66, 178,034.01 and 72,422.02
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Solution
The fourth proportional to 129,010.66, 178,034.01 and 72,422.02 is: 99,941.99
Step by Step Solution
- Step 1: Write the proportion equation
129,010.66 : 178,034.01 = 72,422.02 : x - Step 2: Convert to fraction form
129,010.66/178,034.01 = 72,422.02/x - Step 3: Cross multiply
129,010.66x = 178,034.01 × 72,422.02 - Step 4: Simplify right side
129,010.66x = 12,893,582,632.90 - Step 5: Solve for x
x = 12,893,582,632.90/129,010.66 - Step 6: Final answer
x = 99,941.99
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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.