Finding the Fourth Proportional to 125.55, 187.99 and 79.65
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Solution
The fourth proportional to 125.55, 187.99 and 79.65 is: 119.26
Step by Step Solution
- Step 1: Write the proportion equation
125.55 : 187.99 = 79.65 : x - Step 2: Convert to fraction form
125.55/187.99 = 79.65/x - Step 3: Cross multiply
125.55x = 187.99 × 79.65 - Step 4: Simplify right side
125.55x = 14,973.20 - Step 5: Solve for x
x = 14,973.20/125.55 - Step 6: Final answer
x = 119.26
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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.