Finding the Fourth Proportional to 128,253.66, 176,989.68 and 71,665.08
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Solution
The fourth proportional to 128,253.66, 176,989.68 and 71,665.08 is: 98,897.60
Step by Step Solution
- Step 1: Write the proportion equation
128,253.66 : 176,989.68 = 71,665.08 : x - Step 2: Convert to fraction form
128,253.66/176,989.68 = 71,665.08/x - Step 3: Cross multiply
128,253.66x = 176,989.68 × 71,665.08 - Step 4: Simplify right side
128,253.66x = 12,683,979,576.37 - Step 5: Solve for x
x = 12,683,979,576.37/128,253.66 - Step 6: Final answer
x = 98,897.60
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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.