Finding the Fourth Proportional to 128,223.84, 176,918.58 and 74,476.92
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Solution
The fourth proportional to 128,223.84, 176,918.58 and 74,476.92 is: 102,760.54
Step by Step Solution
- Step 1: Write the proportion equation
128,223.84 : 176,918.58 = 74,476.92 : x - Step 2: Convert to fraction form
128,223.84/176,918.58 = 74,476.92/x - Step 3: Cross multiply
128,223.84x = 176,918.58 × 74,476.92 - Step 4: Simplify right side
128,223.84x = 13,176,350,929.17 - Step 5: Solve for x
x = 13,176,350,929.17/128,223.84 - Step 6: Final answer
x = 102,760.54
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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.