Finding the Fourth Proportional to 128,571,342.03, 177,430,789.74 and 72,828,336.75
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Solution
The fourth proportional to 128,571,342.03, 177,430,789.74 and 72,828,336.75 is: 100,504,428.91
Step by Step Solution
- Step 1: Write the proportion equation
128,571,342.03 : 177,430,789.74 = 72,828,336.75 : x - Step 2: Convert to fraction form
128,571,342.03/177,430,789.74 = 72,828,336.75/x - Step 3: Cross multiply
128,571,342.03x = 177,430,789.74 × 72,828,336.75 - Step 4: Simplify right side
128,571,342.03x = 12,921,989,305,003,166 - Step 5: Solve for x
x = 12,921,989,305,003,166/128,571,342.03 - Step 6: Final answer
x = 100,504,428.91
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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.