Home / 204,890.71-307,160.75-78,621.56

Finding the Fourth Proportional to 204,890.71, 307,160.75 and 78,621.56

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Solution

The fourth proportional to 204,890.71, 307,160.75 and 78,621.56 is: 117,865.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,890.71 : 307,160.75 = 78,621.56 : x
  2. Step 2: Convert to fraction form
    204,890.71/307,160.75 = 78,621.56/x
  3. Step 3: Cross multiply
    204,890.71x = 307,160.75 × 78,621.56
  4. Step 4: Simplify right side
    204,890.71x = 24,149,457,335.77
  5. Step 5: Solve for x
    x = 24,149,457,335.77/204,890.71
  6. Step 6: Final answer
    x = 117,865.07

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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.