Finding the Fourth Proportional to 68.78, 102.99 and 61.99
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Solution
The fourth proportional to 68.78, 102.99 and 61.99 is: 92.82
Step by Step Solution
- Step 1: Write the proportion equation
68.78 : 102.99 = 61.99 : x - Step 2: Convert to fraction form
68.78/102.99 = 61.99/x - Step 3: Cross multiply
68.78x = 102.99 × 61.99 - Step 4: Simplify right side
68.78x = 6,384.35 - Step 5: Solve for x
x = 6,384.35/68.78 - Step 6: Final answer
x = 92.82
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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.