Finding the Fourth Proportional to 149.98, 206.99 and 91.80
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Solution
The fourth proportional to 149.98, 206.99 and 91.80 is: 126.68
Step by Step Solution
- Step 1: Write the proportion equation
149.98 : 206.99 = 91.80 : x - Step 2: Convert to fraction form
149.98/206.99 = 91.80/x - Step 3: Cross multiply
149.98x = 206.99 × 91.80 - Step 4: Simplify right side
149.98x = 19,000.19 - Step 5: Solve for x
x = 19,000.19/149.98 - Step 6: Final answer
x = 126.68
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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.