Finding the Fourth Proportional to 100.71, 139.01 and 68.00
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Solution
The fourth proportional to 100.71, 139.01 and 68.00 is: 93.85
Step by Step Solution
- Step 1: Write the proportion equation
100.71 : 139.01 = 68.00 : x - Step 2: Convert to fraction form
100.71/139.01 = 68.00/x - Step 3: Cross multiply
100.71x = 139.01 × 68.00 - Step 4: Simplify right side
100.71x = 9,451.64 - Step 5: Solve for x
x = 9,451.64/100.71 - Step 6: Final answer
x = 93.85
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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.