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Finding the Fourth Proportional to 139,395.77, 209,115.52 and 83,299.22

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Solution

The fourth proportional to 139,395.77, 209,115.52 and 83,299.22 is: 124,961.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,395.77 : 209,115.52 = 83,299.22 : x
  2. Step 2: Convert to fraction form
    139,395.77/209,115.52 = 83,299.22/x
  3. Step 3: Cross multiply
    139,395.77x = 209,115.52 × 83,299.22
  4. Step 4: Simplify right side
    139,395.77x = 17,419,159,704.81
  5. Step 5: Solve for x
    x = 17,419,159,704.81/139,395.77
  6. Step 6: Final answer
    x = 124,961.90

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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.