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Finding the Fourth Proportional to 139,453.53, 192,380.11 and 101,128.98

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Solution

The fourth proportional to 139,453.53, 192,380.11 and 101,128.98 is: 139,510.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,453.53 : 192,380.11 = 101,128.98 : x
  2. Step 2: Convert to fraction form
    139,453.53/192,380.11 = 101,128.98/x
  3. Step 3: Cross multiply
    139,453.53x = 192,380.11 × 101,128.98
  4. Step 4: Simplify right side
    139,453.53x = 19,455,204,296.59
  5. Step 5: Solve for x
    x = 19,455,204,296.59/139,453.53
  6. Step 6: Final answer
    x = 139,510.30

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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.