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Finding the Fourth Proportional to 262,336,612.80, 393,504,919.20 and 80,592,830.40

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Solution

The fourth proportional to 262,336,612.80, 393,504,919.20 and 80,592,830.40 is: 120,889,245.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,336,612.80 : 393,504,919.20 = 80,592,830.40 : x
  2. Step 2: Convert to fraction form
    262,336,612.80/393,504,919.20 = 80,592,830.40/x
  3. Step 3: Cross multiply
    262,336,612.80x = 393,504,919.20 × 80,592,830.40
  4. Step 4: Simplify right side
    262,336,612.80x = 31,713,675,214,651,304
  5. Step 5: Solve for x
    x = 31,713,675,214,651,304/262,336,612.80
  6. Step 6: Final answer
    x = 120,889,245.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.