Finding the Fourth Proportional to 128,108,256.36, 192,220,940.70 and 69,728,479.08
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Solution
The fourth proportional to 128,108,256.36, 192,220,940.70 and 69,728,479.08 is: 104,624,590.35
Step by Step Solution
- Step 1: Write the proportion equation
128,108,256.36 : 192,220,940.70 = 69,728,479.08 : x - Step 2: Convert to fraction form
128,108,256.36/192,220,940.70 = 69,728,479.08/x - Step 3: Cross multiply
128,108,256.36x = 192,220,940.70 × 69,728,479.08 - Step 4: Simplify right side
128,108,256.36x = 13,403,273,842,337,870 - Step 5: Solve for x
x = 13,403,273,842,337,870/128,108,256.36 - Step 6: Final answer
x = 104,624,590.35
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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.