Finding the Fourth Proportional to 100.42, 149.90 and 93.12
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Solution
The fourth proportional to 100.42, 149.90 and 93.12 is: 139.00
Step by Step Solution
- Step 1: Write the proportion equation
100.42 : 149.90 = 93.12 : x - Step 2: Convert to fraction form
100.42/149.90 = 93.12/x - Step 3: Cross multiply
100.42x = 149.90 × 93.12 - Step 4: Simplify right side
100.42x = 13,958.69 - Step 5: Solve for x
x = 13,958.69/100.42 - Step 6: Final answer
x = 139.00
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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.