Finding the Fourth Proportional to 138,889.44, 191,671.20 and 85,204.08
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Solution
The fourth proportional to 138,889.44, 191,671.20 and 85,204.08 is: 117,583.94
Step by Step Solution
- Step 1: Write the proportion equation
138,889.44 : 191,671.20 = 85,204.08 : x - Step 2: Convert to fraction form
138,889.44/191,671.20 = 85,204.08/x - Step 3: Cross multiply
138,889.44x = 191,671.20 × 85,204.08 - Step 4: Simplify right side
138,889.44x = 16,331,168,258.50 - Step 5: Solve for x
x = 16,331,168,258.50/138,889.44 - Step 6: Final answer
x = 117,583.94
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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.