Finding the Fourth Proportional to 136.24, 188 and 78.02
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Solution
The fourth proportional to 136.24, 188 and 78.02 is: 107.66
Step by Step Solution
- Step 1: Write the proportion equation
136.24 : 188 = 78.02 : x - Step 2: Convert to fraction form
136.24/188 = 78.02/x - Step 3: Cross multiply
136.24x = 188 × 78.02 - Step 4: Simplify right side
136.24x = 14,667.76 - Step 5: Solve for x
x = 14,667.76/136.24 - Step 6: Final answer
x = 107.66
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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.