Finding the Fourth Proportional to 128,707.12, 177,616.92 and 71,347.66
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Solution
The fourth proportional to 128,707.12, 177,616.92 and 71,347.66 is: 98,460.38
Step by Step Solution
- Step 1: Write the proportion equation
128,707.12 : 177,616.92 = 71,347.66 : x - Step 2: Convert to fraction form
128,707.12/177,616.92 = 71,347.66/x - Step 3: Cross multiply
128,707.12x = 177,616.92 × 71,347.66 - Step 4: Simplify right side
128,707.12x = 12,672,551,618.41 - Step 5: Solve for x
x = 12,672,551,618.41/128,707.12 - Step 6: Final answer
x = 98,460.38
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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.