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Finding the Fourth Proportional to 139,236.96, 208,855.44 and 133,288.32

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Solution

The fourth proportional to 139,236.96, 208,855.44 and 133,288.32 is: 199,932.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,236.96 : 208,855.44 = 133,288.32 : x
  2. Step 2: Convert to fraction form
    139,236.96/208,855.44 = 133,288.32/x
  3. Step 3: Cross multiply
    139,236.96x = 208,855.44 × 133,288.32
  4. Step 4: Simplify right side
    139,236.96x = 27,837,990,720.46
  5. Step 5: Solve for x
    x = 27,837,990,720.46/139,236.96
  6. Step 6: Final answer
    x = 199,932.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.