Home / 279,942.76-419,828.01-80,209.63

Finding the Fourth Proportional to 279,942.76, 419,828.01 and 80,209.63

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Solution

The fourth proportional to 279,942.76, 419,828.01 and 80,209.63 is: 120,289.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,942.76 : 419,828.01 = 80,209.63 : x
  2. Step 2: Convert to fraction form
    279,942.76/419,828.01 = 80,209.63/x
  3. Step 3: Cross multiply
    279,942.76x = 419,828.01 × 80,209.63
  4. Step 4: Simplify right side
    279,942.76x = 33,674,249,345.74
  5. Step 5: Solve for x
    x = 33,674,249,345.74/279,942.76
  6. Step 6: Final answer
    x = 120,289.77

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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.