Finding the Fourth Proportional to 128,930.25, 177,924.96 and 72,342.84
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Solution
The fourth proportional to 128,930.25, 177,924.96 and 72,342.84 is: 99,833.80
Step by Step Solution
- Step 1: Write the proportion equation
128,930.25 : 177,924.96 = 72,342.84 : x - Step 2: Convert to fraction form
128,930.25/177,924.96 = 72,342.84/x - Step 3: Cross multiply
128,930.25x = 177,924.96 × 72,342.84 - Step 4: Simplify right side
128,930.25x = 12,871,596,913.29 - Step 5: Solve for x
x = 12,871,596,913.29/128,930.25 - Step 6: Final answer
x = 99,833.80
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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.