Finding the Fourth Proportional to 128,382,986.97, 177,168,522.04 and 73,380,024.45
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Solution
The fourth proportional to 128,382,986.97, 177,168,522.04 and 73,380,024.45 is: 101,264,433.75
Step by Step Solution
- Step 1: Write the proportion equation
128,382,986.97 : 177,168,522.04 = 73,380,024.45 : x - Step 2: Convert to fraction form
128,382,986.97/177,168,522.04 = 73,380,024.45/x - Step 3: Cross multiply
128,382,986.97x = 177,168,522.04 × 73,380,024.45 - Step 4: Simplify right side
128,382,986.97x = 13,000,630,478,698,664 - Step 5: Solve for x
x = 13,000,630,478,698,664/128,382,986.97 - Step 6: Final answer
x = 101,264,433.75
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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.