Home / 279,929.96-419,977.04-90,386.20

Finding the Fourth Proportional to 279,929.96, 419,977.04 and 90,386.20

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Solution

The fourth proportional to 279,929.96, 419,977.04 and 90,386.20 is: 135,605.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,929.96 : 419,977.04 = 90,386.20 : x
  2. Step 2: Convert to fraction form
    279,929.96/419,977.04 = 90,386.20/x
  3. Step 3: Cross multiply
    279,929.96x = 419,977.04 × 90,386.20
  4. Step 4: Simplify right side
    279,929.96x = 37,960,128,732.85
  5. Step 5: Solve for x
    x = 37,960,128,732.85/279,929.96
  6. Step 6: Final answer
    x = 135,605.81

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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.