Finding the Fourth Proportional to 149.13, 223.70 and 79.70
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Solution
The fourth proportional to 149.13, 223.70 and 79.70 is: 119.55
Step by Step Solution
- Step 1: Write the proportion equation
149.13 : 223.70 = 79.70 : x - Step 2: Convert to fraction form
149.13/223.70 = 79.70/x - Step 3: Cross multiply
149.13x = 223.70 × 79.70 - Step 4: Simplify right side
149.13x = 17,827.37 - Step 5: Solve for x
x = 17,827.37/149.13 - Step 6: Final answer
x = 119.55
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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.