Finding the Fourth Proportional to 128,603.57, 177,464.34 and 71,239.02
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Solution
The fourth proportional to 128,603.57, 177,464.34 and 71,239.02 is: 98,305.09
Step by Step Solution
- Step 1: Write the proportion equation
128,603.57 : 177,464.34 = 71,239.02 : x - Step 2: Convert to fraction form
128,603.57/177,464.34 = 71,239.02/x - Step 3: Cross multiply
128,603.57x = 177,464.34 × 71,239.02 - Step 4: Simplify right side
128,603.57x = 12,642,385,700.53 - Step 5: Solve for x
x = 12,642,385,700.53/128,603.57 - Step 6: Final answer
x = 98,305.09
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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.