Finding the Fourth Proportional to 128,478.05, 192,762.71 and 57,394.17
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Solution
The fourth proportional to 128,478.05, 192,762.71 and 57,394.17 is: 86,111.64
Step by Step Solution
- Step 1: Write the proportion equation
128,478.05 : 192,762.71 = 57,394.17 : x - Step 2: Convert to fraction form
128,478.05/192,762.71 = 57,394.17/x - Step 3: Cross multiply
128,478.05x = 192,762.71 × 57,394.17 - Step 4: Simplify right side
128,478.05x = 11,063,455,837.08 - Step 5: Solve for x
x = 11,063,455,837.08/128,478.05 - Step 6: Final answer
x = 86,111.64
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.