Home / 279,835.10-419,628.81-80,109.98

Finding the Fourth Proportional to 279,835.10, 419,628.81 and 80,109.98

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Solution

The fourth proportional to 279,835.10, 419,628.81 and 80,109.98 is: 120,129.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,835.10 : 419,628.81 = 80,109.98 : x
  2. Step 2: Convert to fraction form
    279,835.10/419,628.81 = 80,109.98/x
  3. Step 3: Cross multiply
    279,835.10x = 419,628.81 × 80,109.98
  4. Step 4: Simplify right side
    279,835.10x = 33,616,455,576.52
  5. Step 5: Solve for x
    x = 33,616,455,576.52/279,835.10
  6. Step 6: Final answer
    x = 120,129.52

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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.