Finding the Fourth Proportional to 128,453.22, 177,324.93 and 74,718.63
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Solution
The fourth proportional to 128,453.22, 177,324.93 and 74,718.63 is: 103,146.31
Step by Step Solution
- Step 1: Write the proportion equation
128,453.22 : 177,324.93 = 74,718.63 : x - Step 2: Convert to fraction form
128,453.22/177,324.93 = 74,718.63/x - Step 3: Cross multiply
128,453.22x = 177,324.93 × 74,718.63 - Step 4: Simplify right side
128,453.22x = 13,249,475,834.45 - Step 5: Solve for x
x = 13,249,475,834.45/128,453.22 - Step 6: Final answer
x = 103,146.31
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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.