Finding the Fourth Proportional to 87,431.74, 120,663.75 and 49,705.90
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Solution
The fourth proportional to 87,431.74, 120,663.75 and 49,705.90 is: 68,598.66
Step by Step Solution
- Step 1: Write the proportion equation
87,431.74 : 120,663.75 = 49,705.90 : x - Step 2: Convert to fraction form
87,431.74/120,663.75 = 49,705.90/x - Step 3: Cross multiply
87,431.74x = 120,663.75 × 49,705.90 - Step 4: Simplify right side
87,431.74x = 5,997,700,291.13 - Step 5: Solve for x
x = 5,997,700,291.13/87,431.74 - Step 6: Final answer
x = 68,598.66
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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.