Finding the Fourth Proportional to 128,390.14, 177,175.08 and 71,027.98
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Solution
The fourth proportional to 128,390.14, 177,175.08 and 71,027.98 is: 98,016.78
Step by Step Solution
- Step 1: Write the proportion equation
128,390.14 : 177,175.08 = 71,027.98 : x - Step 2: Convert to fraction form
128,390.14/177,175.08 = 71,027.98/x - Step 3: Cross multiply
128,390.14x = 177,175.08 × 71,027.98 - Step 4: Simplify right side
128,390.14x = 12,584,388,038.74 - Step 5: Solve for x
x = 12,584,388,038.74/128,390.14 - Step 6: Final answer
x = 98,016.78
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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.