Finding the Fourth Proportional to 128,358.99, 177,133.37 and 70,996.41
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Solution
The fourth proportional to 128,358.99, 177,133.37 and 70,996.41 is: 97,973.92
Step by Step Solution
- Step 1: Write the proportion equation
128,358.99 : 177,133.37 = 70,996.41 : x - Step 2: Convert to fraction form
128,358.99/177,133.37 = 70,996.41/x - Step 3: Cross multiply
128,358.99x = 177,133.37 × 70,996.41 - Step 4: Simplify right side
128,358.99x = 12,575,833,006.22 - Step 5: Solve for x
x = 12,575,833,006.22/128,358.99 - Step 6: Final answer
x = 97,973.92
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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.