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Finding the Fourth Proportional to 262,335,789.80, 393,503,684.70 and 80,592,007.40

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Solution

The fourth proportional to 262,335,789.80, 393,503,684.70 and 80,592,007.40 is: 120,888,011.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,335,789.80 : 393,503,684.70 = 80,592,007.40 : x
  2. Step 2: Convert to fraction form
    262,335,789.80/393,503,684.70 = 80,592,007.40/x
  3. Step 3: Cross multiply
    262,335,789.80x = 393,503,684.70 × 80,592,007.40
  4. Step 4: Simplify right side
    262,335,789.80x = 31,713,251,869,269,668
  5. Step 5: Solve for x
    x = 31,713,251,869,269,668/262,335,789.80
  6. Step 6: Final answer
    x = 120,888,011.10

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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.