Finding the Fourth Proportional to 119.99, 165.36 and 87.19
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Solution
The fourth proportional to 119.99, 165.36 and 87.19 is: 120.16
Step by Step Solution
- Step 1: Write the proportion equation
119.99 : 165.36 = 87.19 : x - Step 2: Convert to fraction form
119.99/165.36 = 87.19/x - Step 3: Cross multiply
119.99x = 165.36 × 87.19 - Step 4: Simplify right side
119.99x = 14,417.74 - Step 5: Solve for x
x = 14,417.74/119.99 - Step 6: Final answer
x = 120.16
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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.