Finding the Fourth Proportional to 128,384.50, 177,167.28 and 71,025.94
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Solution
The fourth proportional to 128,384.50, 177,167.28 and 71,025.94 is: 98,013.95
Step by Step Solution
- Step 1: Write the proportion equation
128,384.50 : 177,167.28 = 71,025.94 : x - Step 2: Convert to fraction form
128,384.50/177,167.28 = 71,025.94/x - Step 3: Cross multiply
128,384.50x = 177,167.28 × 71,025.94 - Step 4: Simplify right side
128,384.50x = 12,583,472,599.24 - Step 5: Solve for x
x = 12,583,472,599.24/128,384.50 - Step 6: Final answer
x = 98,013.95
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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.