Finding the Fourth Proportional to 157,138.58, 216,847.08 and 85,517.06
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Solution
The fourth proportional to 157,138.58, 216,847.08 and 85,517.06 is: 118,011.28
Step by Step Solution
- Step 1: Write the proportion equation
157,138.58 : 216,847.08 = 85,517.06 : x - Step 2: Convert to fraction form
157,138.58/216,847.08 = 85,517.06/x - Step 3: Cross multiply
157,138.58x = 216,847.08 × 85,517.06 - Step 4: Simplify right side
157,138.58x = 18,544,124,751.18 - Step 5: Solve for x
x = 18,544,124,751.18/157,138.58 - Step 6: Final answer
x = 118,011.28
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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.