Finding the Fourth Proportional to 87,905.36, 121,309.97 and 47,619.12
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Solution
The fourth proportional to 87,905.36, 121,309.97 and 47,619.12 is: 65,714.70
Step by Step Solution
- Step 1: Write the proportion equation
87,905.36 : 121,309.97 = 47,619.12 : x - Step 2: Convert to fraction form
87,905.36/121,309.97 = 47,619.12/x - Step 3: Cross multiply
87,905.36x = 121,309.97 × 47,619.12 - Step 4: Simplify right side
87,905.36x = 5,776,674,137.67 - Step 5: Solve for x
x = 5,776,674,137.67/87,905.36 - Step 6: Final answer
x = 65,714.70
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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.