Finding the Fourth Proportional to 128,571,465.62, 177,430,959.96 and 72,828,459.74
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Solution
The fourth proportional to 128,571,465.62, 177,430,959.96 and 72,828,459.74 is: 100,504,598.45
Step by Step Solution
- Step 1: Write the proportion equation
128,571,465.62 : 177,430,959.96 = 72,828,459.74 : x - Step 2: Convert to fraction form
128,571,465.62/177,430,959.96 = 72,828,459.74/x - Step 3: Cross multiply
128,571,465.62x = 177,430,959.96 × 72,828,459.74 - Step 4: Simplify right side
128,571,465.62x = 12,922,023,524,076,412 - Step 5: Solve for x
x = 12,922,023,524,076,412/128,571,465.62 - Step 6: Final answer
x = 100,504,598.45
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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.