Finding the Fourth Proportional to 138,622.99, 191,299.74 and 74,960.79
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Solution
The fourth proportional to 138,622.99, 191,299.74 and 74,960.79 is: 103,445.90
Step by Step Solution
- Step 1: Write the proportion equation
138,622.99 : 191,299.74 = 74,960.79 : x - Step 2: Convert to fraction form
138,622.99/191,299.74 = 74,960.79/x - Step 3: Cross multiply
138,622.99x = 191,299.74 × 74,960.79 - Step 4: Simplify right side
138,622.99x = 14,339,979,637.19 - Step 5: Solve for x
x = 14,339,979,637.19/138,622.99 - Step 6: Final answer
x = 103,445.90
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1.5x scale
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.