Finding the Fourth Proportional to 128,428.04, 177,249.50 and 73,969.74
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Solution
The fourth proportional to 128,428.04, 177,249.50 and 73,969.74 is: 102,089.07
Step by Step Solution
- Step 1: Write the proportion equation
128,428.04 : 177,249.50 = 73,969.74 : x - Step 2: Convert to fraction form
128,428.04/177,249.50 = 73,969.74/x - Step 3: Cross multiply
128,428.04x = 177,249.50 × 73,969.74 - Step 4: Simplify right side
128,428.04x = 13,111,099,430.13 - Step 5: Solve for x
x = 13,111,099,430.13/128,428.04 - Step 6: Final answer
x = 102,089.07
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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.