Finding the Fourth Proportional to 90.84, 136.18 and 56.14
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Solution
The fourth proportional to 90.84, 136.18 and 56.14 is: 84.16
Step by Step Solution
- Step 1: Write the proportion equation
90.84 : 136.18 = 56.14 : x - Step 2: Convert to fraction form
90.84/136.18 = 56.14/x - Step 3: Cross multiply
90.84x = 136.18 × 56.14 - Step 4: Simplify right side
90.84x = 7,645.15 - Step 5: Solve for x
x = 7,645.15/90.84 - Step 6: Final answer
x = 84.16
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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.