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Finding the Fourth Proportional to 313,813.80, 470,720.70 and 100,581.30

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Solution

The fourth proportional to 313,813.80, 470,720.70 and 100,581.30 is: 150,871.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,813.80 : 470,720.70 = 100,581.30 : x
  2. Step 2: Convert to fraction form
    313,813.80/470,720.70 = 100,581.30/x
  3. Step 3: Cross multiply
    313,813.80x = 470,720.70 × 100,581.30
  4. Step 4: Simplify right side
    313,813.80x = 47,345,699,942.91
  5. Step 5: Solve for x
    x = 47,345,699,942.91/313,813.80
  6. Step 6: Final answer
    x = 150,871.95

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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.