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Finding the Fourth Proportional to 209,313.65, 313,624.20 and 120,412.10

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Solution

The fourth proportional to 209,313.65, 313,624.20 and 120,412.10 is: 180,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,313.65 : 313,624.20 = 120,412.10 : x
  2. Step 2: Convert to fraction form
    209,313.65/313,624.20 = 120,412.10/x
  3. Step 3: Cross multiply
    209,313.65x = 313,624.20 × 120,412.10
  4. Step 4: Simplify right side
    209,313.65x = 37,764,148,532.82
  5. Step 5: Solve for x
    x = 37,764,148,532.82/209,313.65
  6. Step 6: Final answer
    x = 180,418.95

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1.5x scale

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.