Finding the Fourth Proportional to 128,483.71, 177,312.36 and 71,895.49
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Solution
The fourth proportional to 128,483.71, 177,312.36 and 71,895.49 is: 99,218.48
Step by Step Solution
- Step 1: Write the proportion equation
128,483.71 : 177,312.36 = 71,895.49 : x - Step 2: Convert to fraction form
128,483.71/177,312.36 = 71,895.49/x - Step 3: Cross multiply
128,483.71x = 177,312.36 × 71,895.49 - Step 4: Simplify right side
128,483.71x = 12,747,959,005.26 - Step 5: Solve for x
x = 12,747,959,005.26/128,483.71 - Step 6: Final answer
x = 99,218.48
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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.