Finding the Fourth Proportional to 101.64, 140.10 and 84.12
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Solution
The fourth proportional to 101.64, 140.10 and 84.12 is: 115.95
Step by Step Solution
- Step 1: Write the proportion equation
101.64 : 140.10 = 84.12 : x - Step 2: Convert to fraction form
101.64/140.10 = 84.12/x - Step 3: Cross multiply
101.64x = 140.10 × 84.12 - Step 4: Simplify right side
101.64x = 11,785.21 - Step 5: Solve for x
x = 11,785.21/101.64 - Step 6: Final answer
x = 115.95
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.