Finding the Fourth Proportional to 128,382,986.09, 177,168,520.80 and 73,380,023.57
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Solution
The fourth proportional to 128,382,986.09, 177,168,520.80 and 73,380,023.57 is: 101,264,432.52
Step by Step Solution
- Step 1: Write the proportion equation
128,382,986.09 : 177,168,520.80 = 73,380,023.57 : x - Step 2: Convert to fraction form
128,382,986.09/177,168,520.80 = 73,380,023.57/x - Step 3: Cross multiply
128,382,986.09x = 177,168,520.80 × 73,380,023.57 - Step 4: Simplify right side
128,382,986.09x = 13,000,630,232,166,034 - Step 5: Solve for x
x = 13,000,630,232,166,034/128,382,986.09 - Step 6: Final answer
x = 101,264,432.52
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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.