Finding the Fourth Proportional to 128,411.70, 192,617.55 and 58,427.70
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Solution
The fourth proportional to 128,411.70, 192,617.55 and 58,427.70 is: 87,641.55
Step by Step Solution
- Step 1: Write the proportion equation
128,411.70 : 192,617.55 = 58,427.70 : x - Step 2: Convert to fraction form
128,411.70/192,617.55 = 58,427.70/x - Step 3: Cross multiply
128,411.70x = 192,617.55 × 58,427.70 - Step 4: Simplify right side
128,411.70x = 11,254,200,426.14 - Step 5: Solve for x
x = 11,254,200,426.14/128,411.70 - Step 6: Final answer
x = 87,641.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.