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Finding the Fourth Proportional to 139,067.79, 191,912.74 and 75,404.22

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Solution

The fourth proportional to 139,067.79, 191,912.74 and 75,404.22 is: 104,057.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,067.79 : 191,912.74 = 75,404.22 : x
  2. Step 2: Convert to fraction form
    139,067.79/191,912.74 = 75,404.22/x
  3. Step 3: Cross multiply
    139,067.79x = 191,912.74 × 75,404.22
  4. Step 4: Simplify right side
    139,067.79x = 14,471,029,983.73
  5. Step 5: Solve for x
    x = 14,471,029,983.73/139,067.79
  6. Step 6: Final answer
    x = 104,057.38

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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.