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Finding the Fourth Proportional to 139,505.28, 192,519.24 and 75,843.12

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Solution

The fourth proportional to 139,505.28, 192,519.24 and 75,843.12 is: 104,664.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,505.28 : 192,519.24 = 75,843.12 : x
  2. Step 2: Convert to fraction form
    139,505.28/192,519.24 = 75,843.12/x
  3. Step 3: Cross multiply
    139,505.28x = 192,519.24 × 75,843.12
  4. Step 4: Simplify right side
    139,505.28x = 14,601,259,821.63
  5. Step 5: Solve for x
    x = 14,601,259,821.63/139,505.28
  6. Step 6: Final answer
    x = 104,664.57

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1.5x scale

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.