Finding the Fourth Proportional to 62.76, 86.58 and 51.09
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Solution
The fourth proportional to 62.76, 86.58 and 51.09 is: 70.48
Step by Step Solution
- Step 1: Write the proportion equation
62.76 : 86.58 = 51.09 : x - Step 2: Convert to fraction form
62.76/86.58 = 51.09/x - Step 3: Cross multiply
62.76x = 86.58 × 51.09 - Step 4: Simplify right side
62.76x = 4,423.37 - Step 5: Solve for x
x = 4,423.37/62.76 - Step 6: Final answer
x = 70.48
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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.