Finding the Fourth Proportional to 138,593.20, 191,258.60 and 74,930.96
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Solution
The fourth proportional to 138,593.20, 191,258.60 and 74,930.96 is: 103,404.72
Step by Step Solution
- Step 1: Write the proportion equation
138,593.20 : 191,258.60 = 74,930.96 : x - Step 2: Convert to fraction form
138,593.20/191,258.60 = 74,930.96/x - Step 3: Cross multiply
138,593.20x = 191,258.60 × 74,930.96 - Step 4: Simplify right side
138,593.20x = 14,331,190,506.26 - Step 5: Solve for x
x = 14,331,190,506.26/138,593.20 - Step 6: Final answer
x = 103,404.72
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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.