Finding the Fourth Proportional to 67.72, 93.45 and 40.09
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Solution
The fourth proportional to 67.72, 93.45 and 40.09 is: 55.32
Step by Step Solution
- Step 1: Write the proportion equation
67.72 : 93.45 = 40.09 : x - Step 2: Convert to fraction form
67.72/93.45 = 40.09/x - Step 3: Cross multiply
67.72x = 93.45 × 40.09 - Step 4: Simplify right side
67.72x = 3,746.41 - Step 5: Solve for x
x = 3,746.41/67.72 - Step 6: Final answer
x = 55.32
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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.