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Finding the Fourth Proportional to 139,797.55, 192,919.29 and 76,136.41

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Solution

The fourth proportional to 139,797.55, 192,919.29 and 76,136.41 is: 105,067.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,797.55 : 192,919.29 = 76,136.41 : x
  2. Step 2: Convert to fraction form
    139,797.55/192,919.29 = 76,136.41/x
  3. Step 3: Cross multiply
    139,797.55x = 192,919.29 × 76,136.41
  4. Step 4: Simplify right side
    139,797.55x = 14,688,182,160.35
  5. Step 5: Solve for x
    x = 14,688,182,160.35/139,797.55
  6. Step 6: Final answer
    x = 105,067.52

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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.