Finding the Fourth Proportional to 128,491.29, 177,320.08 and 70,347.05
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Solution
The fourth proportional to 128,491.29, 177,320.08 and 70,347.05 is: 97,080.08
Step by Step Solution
- Step 1: Write the proportion equation
128,491.29 : 177,320.08 = 70,347.05 : x - Step 2: Convert to fraction form
128,491.29/177,320.08 = 70,347.05/x - Step 3: Cross multiply
128,491.29x = 177,320.08 × 70,347.05 - Step 4: Simplify right side
128,491.29x = 12,473,944,182.03 - Step 5: Solve for x
x = 12,473,944,182.03/128,491.29 - Step 6: Final answer
x = 97,080.08
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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.