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Finding the Fourth Proportional to 30,499,940.80, 45,749,911.20 and 10,304,891.20

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Solution

The fourth proportional to 30,499,940.80, 45,749,911.20 and 10,304,891.20 is: 15,457,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,499,940.80 : 45,749,911.20 = 10,304,891.20 : x
  2. Step 2: Convert to fraction form
    30,499,940.80/45,749,911.20 = 10,304,891.20/x
  3. Step 3: Cross multiply
    30,499,940.80x = 45,749,911.20 × 10,304,891.20
  4. Step 4: Simplify right side
    30,499,940.80x = 471,447,857,325,661.44
  5. Step 5: Solve for x
    x = 471,447,857,325,661.44/30,499,940.80
  6. Step 6: Final answer
    x = 15,457,336.80

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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.