Finding the Fourth Proportional to 128,491.02, 177,318.18 and 71,898.75
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Solution
The fourth proportional to 128,491.02, 177,318.18 and 71,898.75 is: 99,220.60
Step by Step Solution
- Step 1: Write the proportion equation
128,491.02 : 177,318.18 = 71,898.75 : x - Step 2: Convert to fraction form
128,491.02/177,318.18 = 71,898.75/x - Step 3: Cross multiply
128,491.02x = 177,318.18 × 71,898.75 - Step 4: Simplify right side
128,491.02x = 12,748,955,494.28 - Step 5: Solve for x
x = 12,748,955,494.28/128,491.02 - Step 6: Final answer
x = 99,220.60
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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.