Finding the Fourth Proportional to 128,507.68, 177,344.58 and 71,918.92
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Solution
The fourth proportional to 128,507.68, 177,344.58 and 71,918.92 is: 99,250.34
Step by Step Solution
- Step 1: Write the proportion equation
128,507.68 : 177,344.58 = 71,918.92 : x - Step 2: Convert to fraction form
128,507.68/177,344.58 = 71,918.92/x - Step 3: Cross multiply
128,507.68x = 177,344.58 × 71,918.92 - Step 4: Simplify right side
128,507.68x = 12,754,430,661.45 - Step 5: Solve for x
x = 12,754,430,661.45/128,507.68 - Step 6: Final answer
x = 99,250.34
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1.5x scale
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.