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Finding the Fourth Proportional to 139,028.99, 191,792.36 and 82,400.27

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Solution

The fourth proportional to 139,028.99, 191,792.36 and 82,400.27 is: 113,672.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,028.99 : 191,792.36 = 82,400.27 : x
  2. Step 2: Convert to fraction form
    139,028.99/191,792.36 = 82,400.27/x
  3. Step 3: Cross multiply
    139,028.99x = 191,792.36 × 82,400.27
  4. Step 4: Simplify right side
    139,028.99x = 15,803,741,835.94
  5. Step 5: Solve for x
    x = 15,803,741,835.94/139,028.99
  6. Step 6: Final answer
    x = 113,672.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.