Finding the Fourth Proportional to 128,283.28, 176,916.30 and 80,541.08
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Solution
The fourth proportional to 128,283.28, 176,916.30 and 80,541.08 is: 111,074.72
Step by Step Solution
- Step 1: Write the proportion equation
128,283.28 : 176,916.30 = 80,541.08 : x - Step 2: Convert to fraction form
128,283.28/176,916.30 = 80,541.08/x - Step 3: Cross multiply
128,283.28x = 176,916.30 × 80,541.08 - Step 4: Simplify right side
128,283.28x = 14,249,029,871.60 - Step 5: Solve for x
x = 14,249,029,871.60/128,283.28 - Step 6: Final answer
x = 111,074.72
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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.