Finding the Fourth Proportional to 150.60, 207.84 and 121.70
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Solution
The fourth proportional to 150.60, 207.84 and 121.70 is: 167.96
Step by Step Solution
- Step 1: Write the proportion equation
150.60 : 207.84 = 121.70 : x - Step 2: Convert to fraction form
150.60/207.84 = 121.70/x - Step 3: Cross multiply
150.60x = 207.84 × 121.70 - Step 4: Simplify right side
150.60x = 25,294.13 - Step 5: Solve for x
x = 25,294.13/150.60 - Step 6: Final answer
x = 167.96
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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.