Finding the Fourth Proportional to 74.47, 102.77 and 67.99
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Solution
The fourth proportional to 74.47, 102.77 and 67.99 is: 93.82
Step by Step Solution
- Step 1: Write the proportion equation
74.47 : 102.77 = 67.99 : x - Step 2: Convert to fraction form
74.47/102.77 = 67.99/x - Step 3: Cross multiply
74.47x = 102.77 × 67.99 - Step 4: Simplify right side
74.47x = 6,986.99 - Step 5: Solve for x
x = 6,986.99/74.47 - Step 6: Final answer
x = 93.82
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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.