Finding the Fourth Proportional to 74.68, 102.97 and 63.59
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Solution
The fourth proportional to 74.68, 102.97 and 63.59 is: 87.68
Step by Step Solution
- Step 1: Write the proportion equation
74.68 : 102.97 = 63.59 : x - Step 2: Convert to fraction form
74.68/102.97 = 63.59/x - Step 3: Cross multiply
74.68x = 102.97 × 63.59 - Step 4: Simplify right side
74.68x = 6,547.96 - Step 5: Solve for x
x = 6,547.96/74.68 - Step 6: Final answer
x = 87.68
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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.