Finding the Fourth Proportional to 128,287.13, 177,041.70 and 71,698.50
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Solution
The fourth proportional to 128,287.13, 177,041.70 and 71,698.50 is: 98,946.99
Step by Step Solution
- Step 1: Write the proportion equation
128,287.13 : 177,041.70 = 71,698.50 : x - Step 2: Convert to fraction form
128,287.13/177,041.70 = 71,698.50/x - Step 3: Cross multiply
128,287.13x = 177,041.70 × 71,698.50 - Step 4: Simplify right side
128,287.13x = 12,693,624,327.45 - Step 5: Solve for x
x = 12,693,624,327.45/128,287.13 - Step 6: Final answer
x = 98,946.99
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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.