Home / 80,709.12-120,898.56-39,121.92

Finding the Fourth Proportional to 80,709.12, 120,898.56 and 39,121.92

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Solution

The fourth proportional to 80,709.12, 120,898.56 and 39,121.92 is: 58,602.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,709.12 : 120,898.56 = 39,121.92 : x
  2. Step 2: Convert to fraction form
    80,709.12/120,898.56 = 39,121.92/x
  3. Step 3: Cross multiply
    80,709.12x = 120,898.56 × 39,121.92
  4. Step 4: Simplify right side
    80,709.12x = 4,729,783,792.44
  5. Step 5: Solve for x
    x = 4,729,783,792.44/80,709.12
  6. Step 6: Final answer
    x = 58,602.84

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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.