Finding the Fourth Proportional to 87,765.21, 121,116.29 and 47,479.14
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Solution
The fourth proportional to 87,765.21, 121,116.29 and 47,479.14 is: 65,521.37
Step by Step Solution
- Step 1: Write the proportion equation
87,765.21 : 121,116.29 = 47,479.14 : x - Step 2: Convert to fraction form
87,765.21/121,116.29 = 47,479.14/x - Step 3: Cross multiply
87,765.21x = 121,116.29 × 47,479.14 - Step 4: Simplify right side
87,765.21x = 5,750,497,051.79 - Step 5: Solve for x
x = 5,750,497,051.79/87,765.21 - Step 6: Final answer
x = 65,521.37
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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.