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Finding the Fourth Proportional to 317,993,786.45, 476,990,846.04 and 99,661,133.11

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Solution

The fourth proportional to 317,993,786.45, 476,990,846.04 and 99,661,133.11 is: 149,491,751.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,993,786.45 : 476,990,846.04 = 99,661,133.11 : x
  2. Step 2: Convert to fraction form
    317,993,786.45/476,990,846.04 = 99,661,133.11/x
  3. Step 3: Cross multiply
    317,993,786.45x = 476,990,846.04 × 99,661,133.11
  4. Step 4: Simplify right side
    317,993,786.45x = 47,537,448,199,443,960
  5. Step 5: Solve for x
    x = 47,537,448,199,443,960/317,993,786.45
  6. Step 6: Final answer
    x = 149,491,751.80

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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.