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Finding the Fourth Proportional to 139,015.08, 191,842.02 and 75,353.94

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Solution

The fourth proportional to 139,015.08, 191,842.02 and 75,353.94 is: 103,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,015.08 : 191,842.02 = 75,353.94 : x
  2. Step 2: Convert to fraction form
    139,015.08/191,842.02 = 75,353.94/x
  3. Step 3: Cross multiply
    139,015.08x = 191,842.02 × 75,353.94
  4. Step 4: Simplify right side
    139,015.08x = 14,456,052,064.56
  5. Step 5: Solve for x
    x = 14,456,052,064.56/139,015.08
  6. Step 6: Final answer
    x = 103,989.09

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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.