Finding the Fourth Proportional to 109.45, 164.48 and 79.18
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Solution
The fourth proportional to 109.45, 164.48 and 79.18 is: 118.99
Step by Step Solution
- Step 1: Write the proportion equation
109.45 : 164.48 = 79.18 : x - Step 2: Convert to fraction form
109.45/164.48 = 79.18/x - Step 3: Cross multiply
109.45x = 164.48 × 79.18 - Step 4: Simplify right side
109.45x = 13,023.13 - Step 5: Solve for x
x = 13,023.13/109.45 - Step 6: Final answer
x = 118.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.