Finding the Fourth Proportional to 129,577.46, 178,812.87 and 72,987.62
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Solution
The fourth proportional to 129,577.46, 178,812.87 and 72,987.62 is: 100,720.65
Step by Step Solution
- Step 1: Write the proportion equation
129,577.46 : 178,812.87 = 72,987.62 : x - Step 2: Convert to fraction form
129,577.46/178,812.87 = 72,987.62/x - Step 3: Cross multiply
129,577.46x = 178,812.87 × 72,987.62 - Step 4: Simplify right side
129,577.46x = 13,051,125,806.67 - Step 5: Solve for x
x = 13,051,125,806.67/129,577.46 - Step 6: Final answer
x = 100,720.65
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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.