Finding the Fourth Proportional to 128,295,284.20, 177,051,227.63 and 72,539,507.68
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Solution
The fourth proportional to 128,295,284.20, 177,051,227.63 and 72,539,507.68 is: 100,106,632.65
Step by Step Solution
- Step 1: Write the proportion equation
128,295,284.20 : 177,051,227.63 = 72,539,507.68 : x - Step 2: Convert to fraction form
128,295,284.20/177,051,227.63 = 72,539,507.68/x - Step 3: Cross multiply
128,295,284.20x = 177,051,227.63 × 72,539,507.68 - Step 4: Simplify right side
128,295,284.20x = 12,843,208,885,614,486 - Step 5: Solve for x
x = 12,843,208,885,614,486/128,295,284.20 - Step 6: Final answer
x = 100,106,632.65
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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.