Finding the Fourth Proportional to 74.90, 112.08 and 61.99
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Solution
The fourth proportional to 74.90, 112.08 and 61.99 is: 92.76
Step by Step Solution
- Step 1: Write the proportion equation
74.90 : 112.08 = 61.99 : x - Step 2: Convert to fraction form
74.90/112.08 = 61.99/x - Step 3: Cross multiply
74.90x = 112.08 × 61.99 - Step 4: Simplify right side
74.90x = 6,947.84 - Step 5: Solve for x
x = 6,947.84/74.90 - Step 6: Final answer
x = 92.76
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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.