Finding the Fourth Proportional to 93.08, 128.58 and 74.63
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Solution
The fourth proportional to 93.08, 128.58 and 74.63 is: 103.09
Step by Step Solution
- Step 1: Write the proportion equation
93.08 : 128.58 = 74.63 : x - Step 2: Convert to fraction form
93.08/128.58 = 74.63/x - Step 3: Cross multiply
93.08x = 128.58 × 74.63 - Step 4: Simplify right side
93.08x = 9,595.93 - Step 5: Solve for x
x = 9,595.93/93.08 - Step 6: Final answer
x = 103.09
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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.