Finding the Fourth Proportional to 157,432.80, 217,257.44 and 85,812.80
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Solution
The fourth proportional to 157,432.80, 217,257.44 and 85,812.80 is: 118,421.75
Step by Step Solution
- Step 1: Write the proportion equation
157,432.80 : 217,257.44 = 85,812.80 : x - Step 2: Convert to fraction form
157,432.80/217,257.44 = 85,812.80/x - Step 3: Cross multiply
157,432.80x = 217,257.44 × 85,812.80 - Step 4: Simplify right side
157,432.80x = 18,643,467,731.88 - Step 5: Solve for x
x = 18,643,467,731.88/157,432.80 - Step 6: Final answer
x = 118,421.75
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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.