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Finding the Fourth Proportional to 139,553.51, 209,399.44 and 55,311.81

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Solution

The fourth proportional to 139,553.51, 209,399.44 and 55,311.81 is: 82,995.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,553.51 : 209,399.44 = 55,311.81 : x
  2. Step 2: Convert to fraction form
    139,553.51/209,399.44 = 55,311.81/x
  3. Step 3: Cross multiply
    139,553.51x = 209,399.44 × 55,311.81
  4. Step 4: Simplify right side
    139,553.51x = 11,582,262,039.39
  5. Step 5: Solve for x
    x = 11,582,262,039.39/139,553.51
  6. Step 6: Final answer
    x = 82,995.13

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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.