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Finding the Fourth Proportional to 139,067.51, 191,912.36 and 75,403.94

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Solution

The fourth proportional to 139,067.51, 191,912.36 and 75,403.94 is: 104,057.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,067.51 : 191,912.36 = 75,403.94 : x
  2. Step 2: Convert to fraction form
    139,067.51/191,912.36 = 75,403.94/x
  3. Step 3: Cross multiply
    139,067.51x = 191,912.36 × 75,403.94
  4. Step 4: Simplify right side
    139,067.51x = 14,470,946,742.12
  5. Step 5: Solve for x
    x = 14,470,946,742.12/139,067.51
  6. Step 6: Final answer
    x = 104,057.00

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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.