Finding the Fourth Proportional to 138,420.30, 207,630.45 and 137,108.10
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Solution
The fourth proportional to 138,420.30, 207,630.45 and 137,108.10 is: 205,662.15
Step by Step Solution
- Step 1: Write the proportion equation
138,420.30 : 207,630.45 = 137,108.10 : x - Step 2: Convert to fraction form
138,420.30/207,630.45 = 137,108.10/x - Step 3: Cross multiply
138,420.30x = 207,630.45 × 137,108.10 - Step 4: Simplify right side
138,420.30x = 28,467,816,501.65 - Step 5: Solve for x
x = 28,467,816,501.65/138,420.30 - Step 6: Final answer
x = 205,662.15
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.