Finding the Fourth Proportional to 128,681.74, 177,576.51 and 71,318.62
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Solution
The fourth proportional to 128,681.74, 177,576.51 and 71,318.62 is: 98,417.32
Step by Step Solution
- Step 1: Write the proportion equation
128,681.74 : 177,576.51 = 71,318.62 : x - Step 2: Convert to fraction form
128,681.74/177,576.51 = 71,318.62/x - Step 3: Cross multiply
128,681.74x = 177,576.51 × 71,318.62 - Step 4: Simplify right side
128,681.74x = 12,664,511,637.62 - Step 5: Solve for x
x = 12,664,511,637.62/128,681.74 - Step 6: Final answer
x = 98,417.32
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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.