Finding the Fourth Proportional to 128,385,281.63, 177,156,741.81 and 71,873,122.07
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Solution
The fourth proportional to 128,385,281.63, 177,156,741.81 and 71,873,122.07 is: 99,176,540.86
Step by Step Solution
- Step 1: Write the proportion equation
128,385,281.63 : 177,156,741.81 = 71,873,122.07 : x - Step 2: Convert to fraction form
128,385,281.63/177,156,741.81 = 71,873,122.07/x - Step 3: Cross multiply
128,385,281.63x = 177,156,741.81 × 71,873,122.07 - Step 4: Simplify right side
128,385,281.63x = 12,732,808,128,747,818 - Step 5: Solve for x
x = 12,732,808,128,747,818/128,385,281.63 - Step 6: Final answer
x = 99,176,540.86
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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.