Finding the Fourth Proportional to 90,830.42, 136,236.99 and 28,489.94
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Solution
The fourth proportional to 90,830.42, 136,236.99 and 28,489.94 is: 42,732.20
Step by Step Solution
- Step 1: Write the proportion equation
90,830.42 : 136,236.99 = 28,489.94 : x - Step 2: Convert to fraction form
90,830.42/136,236.99 = 28,489.94/x - Step 3: Cross multiply
90,830.42x = 136,236.99 × 28,489.94 - Step 4: Simplify right side
90,830.42x = 3,881,383,670.88 - Step 5: Solve for x
x = 3,881,383,670.88/90,830.42 - Step 6: Final answer
x = 42,732.20
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.