Finding the Fourth Proportional to 140.08, 210.08 and 67.80
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Solution
The fourth proportional to 140.08, 210.08 and 67.80 is: 101.68
Step by Step Solution
- Step 1: Write the proportion equation
140.08 : 210.08 = 67.80 : x - Step 2: Convert to fraction form
140.08/210.08 = 67.80/x - Step 3: Cross multiply
140.08x = 210.08 × 67.80 - Step 4: Simplify right side
140.08x = 14,243.42 - Step 5: Solve for x
x = 14,243.42/140.08 - Step 6: Final answer
x = 101.68
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.