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Finding the Fourth Proportional to 239,861, 331,037.34 and 139,259

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Solution

The fourth proportional to 239,861, 331,037.34 and 139,259 is: 192,194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,861 : 331,037.34 = 139,259 : x
  2. Step 2: Convert to fraction form
    239,861/331,037.34 = 139,259/x
  3. Step 3: Cross multiply
    239,861x = 331,037.34 × 139,259
  4. Step 4: Simplify right side
    239,861x = 46,099,928,931.06
  5. Step 5: Solve for x
    x = 46,099,928,931.06/239,861
  6. Step 6: Final answer
    x = 192,194.35

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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.