Finding the Fourth Proportional to 157,658.40, 217,560.60 and 86,037.84
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Solution
The fourth proportional to 157,658.40, 217,560.60 and 86,037.84 is: 118,727.86
Step by Step Solution
- Step 1: Write the proportion equation
157,658.40 : 217,560.60 = 86,037.84 : x - Step 2: Convert to fraction form
157,658.40/217,560.60 = 86,037.84/x - Step 3: Cross multiply
157,658.40x = 217,560.60 × 86,037.84 - Step 4: Simplify right side
157,658.40x = 18,718,444,093.10 - Step 5: Solve for x
x = 18,718,444,093.10/157,658.40 - Step 6: Final answer
x = 118,727.86
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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.