Finding the Fourth Proportional to 135,628.96, 187,130.72 and 81,158.99
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Solution
The fourth proportional to 135,628.96, 187,130.72 and 81,158.99 is: 111,977.12
Step by Step Solution
- Step 1: Write the proportion equation
135,628.96 : 187,130.72 = 81,158.99 : x - Step 2: Convert to fraction form
135,628.96/187,130.72 = 81,158.99/x - Step 3: Cross multiply
135,628.96x = 187,130.72 × 81,158.99 - Step 4: Simplify right side
135,628.96x = 15,187,339,297.52 - Step 5: Solve for x
x = 15,187,339,297.52/135,628.96 - Step 6: Final answer
x = 111,977.12
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.