Finding the Fourth Proportional to 98,988.91, 136,683.43 and 91,432.53
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Solution
The fourth proportional to 98,988.91, 136,683.43 and 91,432.53 is: 126,249.62
Step by Step Solution
- Step 1: Write the proportion equation
98,988.91 : 136,683.43 = 91,432.53 : x - Step 2: Convert to fraction form
98,988.91/136,683.43 = 91,432.53/x - Step 3: Cross multiply
98,988.91x = 136,683.43 × 91,432.53 - Step 4: Simplify right side
98,988.91x = 12,497,311,585.40 - Step 5: Solve for x
x = 12,497,311,585.40/98,988.91 - Step 6: Final answer
x = 126,249.62
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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.